Environmental changes in the late ordovician-early silurian: Review and new insights from black shales and nitrogen isotopes

Bulletin of the Geological Society of America

Volumn 125, Issue 11-12, 2013, Pages 1635-1670

  Melchin, Michael J ^a   Mitchell, Charles E ^b   Holmden, Chris ^c   Štorch, Petr ^d  

^a ST FRANCIS XAVIER UNIVERSITY   (Canada)

^b UNIVERSITY AT BUFFALO   (United States)

^c UNIVERSITY OF SASKATCHEWAN   (Canada)

^d INSTITUTE OF GEOLOGY   (Czech Republic)

Author keywords

[No Author keywords available]

Indexed keywords

ANOXIC CONDITIONS; DENITRIFYING CONDITIONS; ENVIRONMENTAL CHANGE; GLOBAL CORRELATION; INTERGLACIAL PERIODS; NITROGEN ISOTOPES; NUTRIENT CYCLING; PRIMARY PRODUCERS;

BIODIVERSITY; DENITRIFICATION; ISOTOPES; NITROGEN; SEA LEVEL; SHALE; STRATIGRAPHY;

GLACIAL GEOLOGY;

BLACK SHALE; CHEMOSTRATIGRAPHY; EXTINCTION; GLACIER RETREAT; NITROGEN ISOTOPE; ORDOVICIAN-SILURIAN BOUNDARY; PALEOCLIMATE; PALEOENVIRONMENT; PALEOLATITUDE; SEA LEVEL CHANGE; SEDIMENTARY SEQUENCE; SEQUENCE STRATIGRAPHY;

CYANOBACTERIA;

EID: 84887230264     PISSN: 00167606     EISSN: 19432674     Source Type: Journal    
DOI: 10.1130/B30812.1     Document Type: Article

References (405)

1. Achab, A., Asselin, E., Desrochers, A., Riva, J.F., and Farley, C., 2011, Chitinozoan biostratigraphy of a new Upper Ordovician stratigraphic framework for Anticosti Island, Canada: Geological Society of America Bulletin, v. 123, p. 186-205, doi:10.1130/B30131.1.
2. Ader, M., Cartigny, P., Boudou, J.-P., Petit, E., Oh, J.H., and Javoy, M., 2006, Nitrogen isotopic evolution of carbonaceous matter during metamorphism methodology and preliminary results: Chemical Geology, v. 232, p. 152-169, doi:10.1016/j.chemgeo.2006.02.019.
3. Ainsaar, L., Kaljo, D., Martma, T., Meidla, T., Mannik, P., Nolvak, J., and Tinn, O., 2010, Middle and Upper Ordovician carbon isotope chemostratigraphy in Baltoscandia: A correlation standard and clues to environmental history: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 294, p. 189-201, doi:10.1016 /j.palaeo.2010.01.003.
4. Algeo, T.J., and Ingall, E., 2007, Sedimentary Corg:P ratios , paleocean ventilation, and Phanerozoic atmospheric pO2: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 256, p. 130-155, doi:10.1016/j.palaeo.2007 .02.029.
5. Allison, P.A., Wignall, P.B., and Brett, C.E., 1995, Palaeooxygenation: Effects and recognition, in Bosence, D.W.J., and Allison, P.A., eds., A Review of Marine Palaeo environmental Analysis from Fossils: Geological Society of London Special Publication 83, p. 97-112.
6. Alroy, J., 2008, Dynamics of origination and extinction in the marine fossil record: Proceedings of the National Academy of Sciences of the United States of America, v. 105, p. 11,536-11,542, doi:10.1073/pnas.0802597105.
7. Alroy, J., 2010, Geographical, environmental and intrinsic biotic controls on Phanerozoic marine diversification: Palaeontology, v. 53, p. 1211-1235, doi:10.1111 /j.1475-4983.2010.01011.x.
8. Altabet, M.A., Francois, R., Murray, D.W., and Prell, W.L., 1995, Climate-related variations in denitrification in the Arabian Sea from sediment N-15/N-14 ratios: Nature, v. 373, no. 6514, p. 506-509, doi:10.1038 /373506a0.
9. Alvarez, L.W., Alvarez, W., Asaro, F., and Michel, H.V., 1980, Extraterrestrial cause for the Cretaceous-Tertiary boundary extinction: Science, v. 208, p. 1095-1108, doi:10.1126/science.208.4448.1095.
10. Álvaro, J.J., Vennin, E., Villas, E., Destombes, J., and Vizcaïno, D., 2007, Pre-Hirnantian (latest Ordovician) benthic community assemblages: Controls and replacements in a siliciclastic-dominated platform of the eastern Anti-Atlas, Morocco: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 245, p. 20-36, doi:10.1016 /j.palaeo.2005.09.035.
11. Apollonov, M.K., Koren', T.N., Nikitin, I.F., Paletz, L.M., and Tsai, D.T., 1988, Nature of the Ordovician-Silurian boundary in south Kazakhstan, USSR: Bulletin of the British Museum of Natural History (Geology), v. 43, p. 145-154.
12. Armstrong, H.A., 2007, On the cause of Ordovician glaciation, in Williams, M., Haywood, A.M., Gregory, F.J., and Schmidt, D.N., eds., Deep-Time Perspectives on Climate Change: Marrying the Signal from Computer Models and Biological Proxies: The Micropalaeontological Society Special Publications: London, Geological Society of London, p. 101-121.
13. Armstrong, H.A., and Coe, A.L., 1997, Deep-sea sediments record the geophysiology of the Late Ordovician glaciation: Journal of the Geological Society of London, v. 154, p. 929-934, doi:10.1144/gsjgs.154.6.0929.
14. Armstrong, H.A., and Owen, A.W., 2001, Terrane evolution of the paratectonic Caledonides of northern Britain: Journal of the Geological Society of London, v. 158, p. 475-486, doi:10.1144/jgs.158.3.475.
15. Armstrong, H.A., Turner, B.R., Makhlouf, I.M., Weedon, G.P., Williams, M., Al Smadi, A., and Abu Salah, A., 2005, Origin, sequence stratigraphy and depositional environment of an Upper Ordovician (Hirnantian) deglacial black shale, Jordan: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 220, p. 273-289, doi: 10.1016/j.palaeo.2005.01.007.
16. Armstrong, H.A., Turner, B.R., Makhlouf, I.M., Weedon, G.P., Williams, M., Al Smadi, A., and Abu Salah, A., 2006, Reply to "Origin, sequence stratigraphy and depositional environment of an Upper Ordovician (Hirnantian) deglacial black shale, Jordan": Palaeogeography, Palaeoclimatology, Palaeoecology, v. 230, p. 356-360, doi:10.1016/j.palaeo.2005.10.005.
17. Armstrong, H.A., Baldini, J.U.L., Challands, T.J., Grocke, D.R., and Owen, A.W., 2009a, Response of the Intertropical Convergence Zone to Southern Hemisphere cooling during Upper Ordovician glaciation: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 284, p. 227-236, doi:10.1016/j.palaeo.2009.10.001.
18. Armstrong, H.A., Abbott, G.D., Turner, B.R., Makhlouf, I.M., Muhammad, A.B., Pedentchouk, N., and Peters, H., 2009b, Black shale deposition in an Upper Ordovician- Silurian permanently stratified, peri-glacial basin, southern Jordan: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 273, p. 368-377, doi:10.1016 /j.palaeo.2008.05.005.
19. Arthur, M.A., and Sageman, B.B., 1994, Marine black shales: Depositional mechanisms and environments of ancient deposits: Annual Review of Earth and Planetary Sciences, v. 22, p. 499-551, doi:10.1146/annurev .ea.22.050194.002435.
20. Arvidson, R.S., Mackenzie, F.T., and Guidry, M., 2006, MAGic: A Phanerozoic model for the geochemical cycling of major rock-forming components: American Journal of Science, v. 306, p. 135-190, doi:10.2475/ajs .306.3.135.
21. Astini, R.A., and Dávila, F.M., 2004, Ordovician back arc foreland and Ocloyic thrust belt development on the western Gondwana margin as a response to Precordillera terrane accretion: Tectonics, v. 23, TC4008, doi:10.1029/2003TC001620.
22. Astini, R.A., Collo, G., and Martina, F., 2007, Ordovician K-bentonites in the upper-plate active margin of western Gondwana (Famatina Ranges): Stratigraphic and palaeogeographic significance: Gondwana Research, v. 11, p. 311-325, doi:10.1016/j.gr.2006.05.005.
23. Baarli, B.G., Johnson, M.E., and Antoshkina, A.I., 2003, Silurian stratigraphy and paleogeography of Baltica, in Landing, E., and Johnson, M.E., eds., Silurian Lands and Shelf Margins Exclusive of North America: New York State Museum Bulletin 492, p. 3-34.
24. Bambach, R.K., 2006, Phanerozoic biodiversity mass extinctions: Annual Review of Earth and Planetary Sciences, v. 34, p. 127-155, doi:10.1146/annurev.earth.33 .092203.122654.
25. Bapst, D.W., Bullock, P.C., Melchin, M.J., Sheets, H.D., and Mitchell, C.E., 2012, Graptoloid diversity and disparity became decoupled during the Ordovician mass extinction: Proceedings of the National Academy of Sciences of the United States of America, v. 109, p. 3428-3433, doi:10.1073/pnas.1113870109.
26. Barca, S., and Jaeger, H., 1992, New geological and biostratigraphical data on the Silurian in SE-Sardinia: Close affinity with Thuringia: Bolletino della Societá Geologica Italiana, v. 108, p. 565-580.
27. Barca, S., Durand-Delga, M., Rossi, P., and Štorch, P., 1996, Les micaschistes panafricains de Corse et leur couverture paléozoique: Leur interprétation au sein de l'orogene varisque sud-européen: Comptes Rendus de l'Academie des Sciences de Paris, v. 322, p. 981-989.
28. Barnes, C.R., and Williams, S.H., eds., 1991, Advances in Ordovician Geology: Geological Survey of Canada Paper 90-9, 336 p.
29. Bassett, M.G., 1985, Towards a "common language" in stratigraphy: Episodes, v. 8, p. 87-92.
30. Bazhenova, T.K., 2009, Evolution of oil and gas generation in the Earth's history and petroleum prediction in sedimentary basins: Russian Geology and Geophysics, v. 50, p. 308-319, doi:10.1016/j.rgg.2009.03.008.
31. Berger, W.H., and Thierstein, H.R., 1979, On Phanerozoic mass extinctions: Naturwissenschaften, v. 66, p. 46-47, doi:10.1007/BF00369357.
32. Berggren, W.A., and Hollister, C.D., 1977, Plate tectonics and paleocirculation-Commotion in the ocean: Tectonophysics, v. 38, p. 11-48, doi:10.1016/0040-1951 (77)90199-8.
33. Bergman, N.M., Lenton, T.M., and Watson, A.J., 2004, COPSE: A new model of biogeochemical cycling over Phanerozoic time: American Journal of Science, v. 304, p. 397-437, doi:10.2475/ajs.304.5.397.
34. Bergström, S.M., Huff, W.D., Koren', T.N., Larsson, K., Ahlberg, P., and Kolata, D.R., 1999, The 1997 core drilling through Ordovician and Silurian strata at Röstånga, S. Sweden: Preliminary stratigraphic assessment and regional comparison: GFF, v. 121, p. 127- 135, doi:10.1080/11035899901212127.
35. Bergström, S.M., Saltzman, M.M., and Schmitz, B., 2006, First record of the Hirnantian (Upper Ordovician) d13C excursion in the North American midcontinent and its regional implications: Geological Magazine, v. 143, p. 657-678, doi:10.1017/S0016756806002469.
36. Bergström, S.M., Chen, X., Gutiérrez-Marco, J.C., and Dronov, A., 2009, The new chronostratigraphic classification of the Ordovician System and its relations to major regional series and stages and to d13C chemostratigraphy: Lethaia, v. 42, p. 97-107, doi:10.1111 /j.1502-3931.2008.00136.x.
37. Bergström, S.M., Young, S., and Schmitz, B., 2010, Katian (Upper Ordovician) d13C chemostratigraphy and sequence stratigraphy in the United States and Baltoscandia: A regional comparison: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 217-234, doi:10.1016/j.palaeo.2010.02.035.
38. Bergström, S.M., Kleffner, M., Schmitz, B., and Cramer, B.D., 2011, Revision of the position of the Ordovician-Silurian boundary in southern Ontario: Regional chrono stratigraphic implications of d13C chemostratigraphy of the Manitoulin Formation and associated strata: Canadian Journal of Earth Sciences, v. 48, p. 1447-1470, doi:10.1139/e11-039.
39. Berner, R.A., 1991, A model for atmospheric CO2 over Phanero zoic time: American Journal of Science, v. 291, p. 339-376, doi:10.2475/ajs.291.4.339.
40. Berner, R.A., 2006, GEOCARBSULF: A combined model for Phanerozoic atmospheric O2 and CO2: Geochimica et Cosmochimica Acta, v. 70, p. 5653-5664, doi:10.1016 /j.gca.2005.11.032.
41. Berner, R.A., 2009, Phanerozoic atmospheric oxygen: New results using the GEOCARBSULF model: American Journal of Science, v. 309, p. 603-606, doi:10.2475 /07.2009.03.
42. Berry, W.B.N., 1998, The Arabian Sea: A modern analogue for North African-Southern European Silurian organic-rich graptolite-bearing shales?: Temas Geológico-Mineros ITGE, v. 23, p. 57-59.
43. Berry, W.B.N., 2010, Black shales: An Ordovician perspective, in Finney, S.C., and Berry, W.B.N., eds., The Ordovician Earth System: Geological Society of America Special Paper 466, p. 141-147.
44. Berry, W.B.N., and Wilde, P., 1978, Progressive ventilation of the oceans-An explanation for the distribution of the Lower Paleozoic black shales: American Journal of Science, v. 278, p. 257-275, doi:10.2475 /ajs.278.3.257.
45. Berry, W.B.N., Wilde, P., and Quinby-Hunt, M.S., 1987, The oceanic non-sulfidic oxygen minimum zone: A habitat for graptolites?: Bulletin of the Geological Society of Denmark, v. 35, p. 103-114.
46. Beuf, S., Biju-Duval, B., de Charpall, O., Rognon, P., Gariel, O., and Bennacaf, A., 1971, Les grès du Paléozoïque inférieur au Sahara, sédimentation et disconti nuitiés, evolution structurale d'un craton: Institute Francais Pétrole, Science et technique du Pétrole, 18, éditions Technip, 464 p.
47. Bjerrum, C.J., Bendtsen, J., and Legarth, J.J.F., 2006, Modeling organic carbon burial during sea level rise with reference to the Cretaceous: Geochemistry Geophysics Geosystems, v. 7, p. 1-24, doi:10.1029 /2005GC001032.
48. Boucot, A.J., Rong, J., and Scotese, C.R., 2003, Pre-Hirnantian Ashgill climatically warm event in the Mediterranean region: Lethaia, v. 36, p. 119-131, doi:10.1080 /00241160310001245.
49. Boudou, J.P., Schimmelmann, A., Ader, M., Mastalerz, M., Sebilo, M., and Gengembre, L., 2008, Organic nitrogen chemistry during low-grade metamorphism: Geochimica et Cosmochimica Acta, v. 72, p. 1199-1221, doi:10.1016/j.gca.2007.12.004.
50. Boulila, S., Galbrun, B., Miller, K.G., Pekar, S.F., Browning, J.V., Laskar, J., and Wright, J.D., 2011, On the origin of Cenozoic and Mesozoic "third-order" eustatic sequences: Earth-Science Reviews, v. 109, p. 94-112, doi:10.1016/j.earscirev.2011.09.003.
51. Boyer, D.L., and Droser, M.L., 2009, Palaeoecological patterns within the dysaerobic biofacies: Examples from Devonian black shales of New York State: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 276, p. 206-216, doi:10.1016/j.palaeo.2009.03.014.
52. Boyer, D.L., Owens, J.D., Lyons, T.W., and Droser, M.L., 2011, Joining forces: Combined biological and geochemical proxies reveal a complex but refined high-resolution palaeo-oxygen history in Devonian epeiric seas: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 306, p. 134-146, doi:10.1016/j.palaeo .2011.04.012.
53. Brandes, J.A., Devol, A.H., and Deutsch, C., 2007, New developments in the marine nitrogen cycle: Chemical Reviews, v. 107, p. 577-589, doi:10.1021/cr050377t.
54. Brenchley, P.J., 1988, Environmental changes close to the Ordovician-Silurian boundary: Bulletin of the British Museum of Natural History (Geology), v. 43, p. 377-385.
55. Brenchley, P.J., 1989, The Late Ordovician extinction, in Donovan, S.K., ed., Mass Extinctions: Processes and Evidence: London, Belhaven Press, p. 104-132.
56. Brenchley, P.J., and Cullen, B., 1984, The environmental distribution of associations belonging to the Hirnantia fauna-Evidence from North Wales and Norway, in Bruton, D.L., ed., Aspects of the Ordovician System: Oslo, Norway, Universitetsforlaget, Palaeontological Contributions from the University of Oslo, v. 295, p. 113-125.
57. Brenchley, P.J., and Newall, G., 1984, Late Ordovician environmental changes and their effect on faunas, in Bruton, D.L., ed., Aspects of the Ordovician System: Oslo, Norway, Universitetsforlaget, Palaeontological Contributions from the University of Oslo, v. 295, p. 65-79.
58. Brenchley, P.J., and Štorch, P., 1989, Environmental changes in the Hirnantian (Upper Ordovician) of the Prague Basin, Czechoslovakia: Geological Journal, v. 24, p. 165-181, doi:10.1002/gj.3350240302.
59. Brenchley, P.J., Romano, M., Young, T.P., and Štorch, P., 1991, Hirnantian glaciomarine diamictites-Evidence for the spread of glaciation and its effect on Upper Ordo vician faunas, in Barnes, C.R., and Williams, S.H., eds., Advances in Ordovician Geology: Geological Survey of Canada Paper 90-9, p. 325-336.
60. Brenchley, P.J., Marshall, J.D., Carden, G.A.F., Robertson, D.B.R., Long, D.G.F., Meidla, T., Hints, L., and Anderson, T.F., 1994, Bathymetric and isotopic evidence for a short-lived Late Ordovician glaciation in a greenhouse period: Geology, v. 22, p. 295-298, doi:10.1130 /0091-7613(1994)022<0295:BAIEFA>2.3.CO;2.
61. Brenchley, P.J., Marshall, J.D., and Underwood, C.J., 2001, Do all mass extinctions represent an ecological crisis? Evidence from the Late Ordovician: Geological Journal, v. 36, p. 329-340, doi:10.1002/gj.880.
62. Brenchley, P.J., Carden, G.A., Hints, L., Kaljo, D., Marshall, J.D., Martma, T., Meidla, T., and Nõlvak, J., 2003, Highresolution stable isotope stratigraphy of Upper Ordovician sequences: Constraints on the timing of bioevents and environmental changes associated with mass extinction and glaciation: Geological Society of America Bulletin, v. 115, p. 89-104, doi:10.1130/0016-7606 (2003)115<0089:HRSISO>2.0.CO;2.
63. Brenchley, P.J., Marshall, J.D., Harper, D.A.T., Buttler, C.J., and Underwood, C.J., 2006, A Late Ordovician (Hirnantian) karstic surface in a submarine channel, recording glacio-eustatic sea-level changes: Meifod, central Wales: Geological Journal, v. 41, p. 1-22, doi: 10.1002/gj.1029.
64. Broecker, W.S., Kennett, J.P., Flower, B.P., Teller, J.T., Trumbore, S., Bonani, G., and Wolfli, W., 1989, Routing of meltwater from the Laurentide ice sheet during the Younger Dryas cold episode: Nature, v. 341, p. 318-321, doi:10.1038/341318a0.
65. Brooks, J., and Fleet, A.J., eds., 1987, Marine Petroleum Source Rocks: Geological Society of London Special Publication 26, 444 p.
66. Buggisch, W., and Astini, R.A., 1993, The Late Ordovician ice age: New evidence from the Argentine Precordillera, in Findley, R.H., Unrug, R., Banks, M.R., and Veevers, J.J., eds., Gondwana Eight: Assembly, Evolution and Dispersal: Rotterdam, Netherlands, Balkema, p. 439-447.
67. Buggisch, W., Joachimski, M.M., Lehnert, O., Bergström, S.M., Repetski, J.E., and Webers, G.F., 2010, Did intense volcanism trigger the first Late Ordovician icehouse?: Geology, v. 38, p. 327-330, doi:10.1130 /G30577.1.
68. Bustin, R.M., Barnes, M.A., and Barnes, W.C., 1990, Determining levels of organic diagenesis in sediments and fossil fuels, in Mcllreath, I.A., and Morrow, D.W., eds., Diagenesis: Geoscience Canada Reprint Series 4: Ontario, Canada, Runge Press, p. 205-226.
69. Butterfield, N.J., 2009, Oxygen, animals and oceanic ventilation: An alternative view: Geobiology, v. 7, p. 1-7, doi:10.1111/j.1472-4669.2009.00188.x.
70. Butterfield, N.J., 2011, Animals and the invention of the Phanerozoic Earth system: Trends in Ecology & Evolution, v. 26, p. 81-87, doi:10.1016/j.tree.2010.11.012.
71. Calner, M., 2008, Silurian global events-At the tipping point of climate change, in Elewa, A.M.T., ed., Mass Extinctions: Berlin, Springer-Verlag, p. 21-58.
72. Came, R.E., Eiler, J.M., Veizer, J., Azmy, K., Brand, U., and Weidman, C.R., 2007, Coupling of surface temperatures and atmospheric CO2 concentrations during the Palaeozoic Era: Nature, v. 449, p. 198-201, doi: 10.1038/nature06085.
73. Caputo, M.V., 1998, Ordovician-Silurian glaciations and global sea-level changes, in Landing, E., and Johnson, M.E., eds., Silurian Cycles: Linkages of Dynamic Stratigraphy with Atmospheric, Oceanic, and Tectonic Changes; James Hall Centennial Volume: Albany, New York, New York State Museum, p. 15-25.
74. Caputo, M.V., and Crowell, J.C., 1985, Migration of glacial centres across Gondwana during Paleozoic Era: Geological Society of America Bulletin, v. 96, p. 1020-1036, doi:10.1130/0016-7606(1985)96<1020: MOGCAG>2.0.CO;2.
75. Challands, T.J., Armstrong, H.A., Maloney, D.P., Davies, J.R., Wilson, D., and Owen, A.W., 2009, Organic-carbon deposition and coastal upwelling at mid-latitude during the Upper Ordovician (late Katian): A case study from the Welsh Basin, UK: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 273, p. 395-410, doi:10.1016/j.palaeo.2008.10.004.
76. Chen, X., 1984, Influence of the Late Ordovician glaciation on basin configuration of the Yangtze Platform in China: Lethaia, v. 17, p. 51-59, doi:10.1111/j.1502 -3931.1984.tb00665.x.
77. Chen, X., and Mitchell, C.E., 1996, Stratigraphic evidences on the Taconic and Guangxian orogeny: Journal of Stratigraphy, v. 20, p. 305-313.
78. Chen, X., Xiao, C., and Chen, H., 1987, Wufengian (Ashgillian) graptolite faunal differentiation and anoxic environment in South China: Acta Palaeontologica Sinica, v. 26, p. 326-344.
79. Chen, X., Rong, J.Y., Mitchell, C.E., Harper, D.A.T., Fan, J.X., Zhan, R.B., Zhang, Y.D., Li, R.Y. and Wang, Y., 2000, Late Ordovician to earliest Silurian graptolite and brachiopod biozonation from the Yangtze region, South China, with a global correlation: Geological Magazine, v. 137, p. 623-650, doi:10.1017 /S0016756800004702.
80. Chen, X., Melchin, M.J., Fan, J., and Mitchell, C.E., 2003, Ashgillian graptolite fauna of the Yangtze region and the biogeographical distribution of diversity in the latest Ordovician: Bulletin de la Société Géologique de France, v. 174, p. 141-148, doi:10.2113/174.2.141.
81. Chen, X., Rong, J.Y., Li, Y., and Boucot, A.J., 2004, Facies patterns and geography of the Yangtze region, South China, through Ordovician and Silurian transition: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 204, p. 353-372, doi:10.1016/S0031-0182 (03)00736-3.
82. Chen, X., Melchin, M.J., Sheets, H.D., Mitchell, C.E., and Fan, J.-X., 2005, Patterns and processes of latest Ordovician graptolites extinction and recovery based on data from South China: Journal of Paleontology, v. 79, p. 842-861, doi:10.1666/0022-3360(2005)079[0842: PAPOLO]2.0.CO;2.
83. Cherns, L., and Wheeley, J.R., 2007, A pre-Hirnantian (Late Ordovician) interval of global cooling-The Boda event re-assessed: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 251, p. 449-460, doi:10.1016 /j.palaeo.2007.04.010.
84. Cherns, L., and Wheeley, J.R., 2009, Early Palaeozoic cooling events: Peri-Gondwana and beyond, in Bassett, M.G., ed., Early Palaeozoic Peri-Gondwanan Terranes: New Insights from Tectonics and Biogeography: Geological Society of London Special Publication 325, p. 256-278.
85. Churkin, M.J., and Carter, C., 1970, Early Silurian Graptolites from Southeastern Alaska and their Correlation with Graptolitic Sequences in North America and the Arctic: U.S. Geological Survey Professional Paper 653, 51 p.
86. Cocks, L.R.M., 1985, The Ordovician-Silurian boundary: Episodes, v. 8, p. 98-100.
87. Cocks, L.R.M., 1988, The Ordovician-Silurian boundary in the Oslo region, Norway: Bulletin of the British Museum of Natural History (Geology), v. 43, p. 81-84.
88. Cocks, L.R.M., and Rickards, R.B., eds., 1988, A Global Analysis of the Ordovician-Silurian Boundary: British Museum (Natural History) Bulletin 43 (Geology Series), 394 p.
89. Cooper, R.A., and Sadler, P.M., 2010, Facies preference predicts extinction risk in Ordovician graptolites: Paleobiology, v. 36, p. 167-187, doi:10.1666/09043.1.
90. Cooper, R.A., and Sadler, P.M., 2012, The Silurian Period , in Gradstein, F.M., Ogg, J.G., and Smith, A.G., eds., A Geologic Time Scale 2012: Elsevier Press, p. 489-523.
91. Cooper, R.A., Rigby, S., Loydell, D.K., and Bates, D.E.B., 2012, Palaeoecology of the Graptoloidea: Earth-Science Reviews, v. 112, p. 23-41, doi:10.1016 /j.earscirev.2012.01.001.
92. Cramer, B.D., Brett, C.E., Melchin, M.J., Männik, P., Kleff ner, M.A., McLaughlin, P.I., Loydell, D.K., Munnecke, A., Jeppsson, L., Corradini, C., Brunton, F.R., and Saltzman, M.R., 2011, Revised correlation of Silurian Provincial Series of North America with global and regional chronostratigraphic units and d13Ccarb chemostratigraphy: Lethaia, v. 44, p. 185-202, doi:10.1111/j.1502 -3931.2010.00234.x.
93. Cuerda, A.J., Rickards, R.B., and Cingolani, C., 1988, A new Ordovician-Silurian boundary section in San Juan Province, Argentina, and its definitive graptolite fauna: Journal of the Geological Society of London, v. 145, p. 749-757, doi:10.1144/gsjgs.145.5.0749.
94. de Jong, K., Xiao, W., Windley, B.F., Masago, H., and Lo, C.-h., 2006, Ordovician 40Ar/39Ar phengite ages from the blueschist-facies Ondor Sum subduction-accretion complex (Inner Mongolia) and implications for the early Paleozoic history of continental blocks in China and adjacent areas: American Journal of Science, v. 306, p. 799-845, doi:10.2475/10.2006.02.
95. Delabroye, A., and Vecoli, M., 2010, The end-Ordovician glaciation and the Hirnantian Stage: A global review and questions about Late Ordovician event stratigraphy: Earth-Science Reviews, v. 98, p. 269-282, doi: 10.1016/j.earscirev.2009.10.010.
96. Delabroye, A., Munnecke, A., Vecoli, M., Copper, P., Tribovillard, N., Joachimski, M.M., Desrochers, A., and Servais, T., 2011, Phytoplankton dynamics across the Ordovician/Silurian boundary at low palaeolatitudes: Correlations with carbon isotopic and glacial events: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 312, p. 79-97, doi:10.1016/j.palaeo.2011.09.011.
97. Desrochers, A., Farley, C., Achab, A., Asselin, E., and Riva, J.F., 2010, A far-field record of the end Ordovician glaciation: The Ellis Bay Formation, Anticosti Island, eastern Canada: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 248-263, doi:10.1016 /j.palaeo.2010.02.017.
98. Destombes, J., 1968, Sur la nature glaciaire des sediments du groupe du deuxieme Bani, Ashgill superieur de l'Anti-Atlas, Maroc: Compte Rendus Hedbomadaires des Seances de l'Academie des Sciences, Paris, ser. D, v. 267, p. 684-686.
99. Destombes, J., and Willefert, S., 1988, The Ordovician-Silurian boundary in Morocco, in Cocks, L.R.M., and Rickards, R.B., eds., A Global Analysis of the Ordovician-Silurian Boundary: Bulletin of the British Museum of Natural History (Geology), v. 43, p. 165-170.
100. Dewing, K., and Obermajer, M., 2009, Lower Paleozoic thermal maturity and hydrocarbon potential of the Canadian Arctic archipelago: Bulletin of Canadian Petroleum Geology, v. 57, p. 141-166, doi:10.2113 /gscpgbull.57.2.141.
101. Díaz-Martínez, E., and Grahn, Y., 2007, Early Silurian glaciation along the western margin of Gondwana (Peru, Bolivia and northern Argentina): Palaeogeographic and geodynamic setting: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 245, p. 62-81, doi:10.1016 /j.palaeo.2006.02.018.
102. Díaz-Martínez, E., Vavrdová, M., Isaacson, E., and Grahn, Y., 2011, Early Silurian vs. Late Ordovician glaciation in South America, in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geológico y Minero de España, Madrid, Spain, v. 14, p. 127-134.
103. Dover, J.H., Berry, W.B.N., and Ross, R.J., Jr., 1980, Ordovician and Silurian Phi Kappa and Trail Creek Formations, Pioneer Mountains, Central Idaho-Stratigraphic and Structural Revisions, and New Data on Graptolite Faunas: U.S. Geological Survey Professional Paper 1090, p. 1-54.
104. Droser, M.L., Bottjer, D.J., Sheehan, P.M., and McGhee, G.R., 2000, Decoupling of taxonomic and ecologic severity of Phanerozoic marine mass extinctions: Geology, v. 28, p. 675-678, doi:10.1130/0091-7613 (2000)28<675:DOTAES>2.0.CO;2.
105. Elrick, M., Reardon, D., Labor, W., Martin, J., Desrochers, A., and Pope, M., 2013, Orbital-scale climate change and glacioeustasy during the early Late Ordovician (pre-Hirnantian) determined from d18O values in marine apatite: Geology, v. 41, p. 775-778, doi:10.1130 /G34363.1.
106. Emsbo, P., 1993, Cottonwood and Meadow Canyons, in Finney, S.C., Perry, B.D., Emsbo, P., and Madrid, R.J., eds., Crustal Evolution of the Great Basin and Sierra Nevada: Boulder, Colorado, Cordilleran/Rocky Mountain Section, Geological Society of America, and Reno, Department of Geological Sciences, University of Nevada , p. 197-230.
107. Fan, J.X., Peng, P., and Melchin, M.J., 2009, Carbon isotopes and event stratigraphy near the Ordovician-Silurian boundary, Yichang, South China: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 276, p. 160-169, doi:10.1016/j.palaeo.2009.03.007.
108. Fan, J.X., Melchin, M.J., Chen, X., Wang, Y., Zhang, Y.D., Chen, Q., Chi, Z.L., and Chen, F., 2011, Biostratigraphy and geography of the Ordovician-Silurian Lungmachi black shales in South China: Science China-Earth Science, v. 54, p. 1854-1863.
109. Fatka, O., and Mergl, M., 2009, The "microcontinent" Perunica: Status and story 15 years after conception, in Bassett, M.G., eds., Early Palaeozoic Peri-Gondwana Terranes: New Insights from Tectonics and Biogeography: Geological Society of London Special Publication 325, p. 65-101.
110. Fergusson, C.L., 2003, Ordovician-Silurian accretion tectonics of the Lachlan fold belt, southeastern Australia: Australian Journal of Earth Sciences, v. 50, p. 475- 490, doi:10.1046/j.1440-0952.2003.01013.x.
111. Ferretti, A., 1998, Late Ordovician conodonts from the Prague Basin, Bohemia, in Szaniawski, H., ed., Proceedings of the Sixth European Conodont Symposium (ECOS VI): Acta Palaeontologica Polonica, v. 58, p. 123-139.
112. Ferretti, A., Melchin, M.J., and Negri, A., 2012, Are there black shales and black shales?: Bollettino della Società Paleontologica Italiana, v. 51, p. 149-150.
113. Finlay, A.J., Selby, D., and Grocke, D.R., 2010, Tracking the Hirnantian glaciation using Os isotopes: Earth and Planetary Science Letters, v. 293, p. 339-348, doi: 10.1016/j.epsl.2010.02.049.
114. Finnegan, S., Bergmann, K., Eiler, J.M., Jones, D.S., Fike, D.A., Eisenman, I., Hughes, N.C., Tripati, A.K., and Fischer, W.W., 2011, The magnitude and duration of Late Ordovician-Early Silurian glaciation: Science, v. 331, p. 903-906, doi:10.1126/science.1200803.
115. Finnegan, S., Heim, N.A., Peters, S.E., and Fischer, W.W., 2012, Climate change and the selective signature of the Late Ordovician mass extinction: Proceedings of the National Academy of Sciences of the United States of America, v. 109, p. 6829-6834, doi:10.1073 /pnas.1117039109.
116. Finney, S.C., and Berry, W.B.N., 1997, New perspectives on graptolite distributions and their use as indicators of platform margin dynamics: Geology, v. 25, p. 919-922, doi:10.1130/0091-7613(1997)025<0919: NPOGDA>2.3.CO;2.
117. Finney, S.C., Cooper, J.D., and Berry, W.B.N., 1997, Late Ordovician mass extinction: Sedimentologic, cyclostratigraphic, and biostratigraphic records from platform and basin successions: Central Nevada: Brigham Young University Geology Studies, v. 42, p. 79-102.
118. Finney, S.C., Berry, W.B., Cooper, J.D., Rippardan, R.L., Sweet, W.C., Jacobson, S.R., Soufiane, A., Achab, A., and Noble, P.J., 1999, Late Ordovician mass extinction: A new perspective from stratigraphic sections in central Nevada: Geology, v. 27, p. 215-218, doi:10.1130 /0091-7613(1999)027<0215:LOMEAN>2.3.CO;2.
119. Finney, S.C., Noble, P.J., and Cluer, J.K., 2000, Lower Paleo zoic stratigraphy and structure of central Nevada: Comparisons and contrasts between the lower and upper plates of the Roberts Mountains thrust, in Schweickert , R.A., Lahren, M.M., Karlin, R., Howle, J., and Smith, K., eds., Great Basin and Sierra Nevada: Geological Society of America Field Guide 2, p. 279-300.
120. Finney, S.C., Berry, W.B.N., and Cooper, R.A., 2007, The influence of denitrifying seawater on graptolite extinction and diversification during the Hirnantian (latest Ordovician) mass extinction event: Lethaia, v. 40, p. 281-291, doi:10.1111/j.1502-3931.2007.00027.x.
121. Floyd, J.D., 2001, The Southern Uplands terrane: A stratigraphical review: Transactions of the Royal Society of Edinburgh-Earth Sciences, v. 91, p. 349-362, doi: 10.1017/S0263593300008233.
122. Fortey, R.A., 1989, There are extinctions and extinctions: Examples from the Lower Palaeozoic: Philosophical Transactions of the Royal Society of London, ser. B, Biological Sciences, v. 325, p. 327-355, doi:10.1098 /rstb.1989.0092.
123. Fortey, R.A., and Cocks, L.R.M., 2005, Late Ordovician global warming-The Boda event: Geology, v. 33, p. 405-408, doi:10.1130/G21180.1.
124. Fortey, R.A., Harper, D.A.T., Ingham, J.K., Owen, A.W., Parkes, M.A., Rushton, A.W.A., and Woodcock, N.H., 2000, A revised correlation of Ordovician rocks in the British Isles: The Geological Society of London Special Report 24, p. 1-83.
125. Foster, D.A., and Gray, D.R., 2000, Evolution and structure of the Lachlan fold belt (orogen) of eastern Australia: Annual Review of Earth and Planetary Sciences, v. 28, p. 47-80, doi:10.1146/annurev.earth.28.1.47.
126. Frakes, L.A., 1979, Climates throughout Geological Time: Amsterdam, Netherlands, Elsevier, 310 p.
127. Frakes, L.A., Francis, J.E., and Syktus, J.I., 1992, Climate Modes of the Phanerozoic: Cambridge, UK, Cambridge University Press, 274 p.
128. Ganeshram, R.S., Pedersen, T.F., Calvert, S.E., McNeill, G.W., and Fontugne, M.R., 2000, Glacial-interglacial variability in denitrification in the world's oceans: Causes and consequences: Paleoceanography, v. 15, p. 361-376, doi:10.1029/1999PA000422.
129. Ghienne, J.-F., 2003, Late Ordovician sedimentary environments, glacial cycles, and post-glacial transgression in the Taoudeni Basin, West Africa: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 189, p. 117-145, doi:10.1016/S0031-0182(02)00635-1.
130. Ghienne, J.F., 2011, The Late Ordovician glacial record: State of the art, in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geológico y Minero de España, Madrid, Spain, v. 14, p. 13-19.
131. Ghienne, J.-F., Le Heron, D.P., Moreau, J., Denis, M., and Deynoux, M., 2007, The Late Ordovician glacial sedimentary system of the North Gondwana platform, in Hambrey, M., Christoffersen, P., Glasser, N., Janssen, P., Hubbard, B., and Siegert, M., eds., Glacial Sedimentary Processes and Products: International Association of Sedimentologists Special Publication 39, p. 295-319.
132. Glorie, S., De Grave, J., Buslov, M.M., Zhimulev, F.I., Izmer, A., Vandoorne, W., Ryabinin, A., Van den Haute, P., Vanhaecke, F., and Elburg, M.A., 2011, Formation and Palaeozoic evolution of the Gorny-Altai-Altai-Mongolia suture zone (south Siberia): Zircon U/Pb constraints on the igneous record: Gondwana Research, v. 20, p. 465- 484, doi:10.1016/j.gr.2011.03.003.
133. Gogin, I.J., Koren', T.N., Pegel', T.V., and Sobolevskaya, R.F., 1997, Atlas zonalnykh kompleksov veduscikh grup rannepaleozoiskoi fauny severa Rossii: St. Petersburg, Izdatelstvo. VSEGEI, 205 p.
134. Goldman, D., and Bergström, S.M., 1997, Late Ordovician graptolites from the North American midcontinent: Palaeon tology, v. 40, p. 965-1010.
135. Goldman, D., Mitchell, C.E., Maletz, J., Riva, J.F.V., Leslie, S.A., and Motz, G.J., 2007, Ordovician graptolites and conodonts of the Phi Kappa Formation in the Trail Creek region of central Idaho: A revised, integrated biostratigraphy: Acta Palaeontologica Sinica, v. 46, p. 155-162.
136. Goldman, D., Mitchell, C.E., Melchin, M.J., Fan, J.X., Wu, S.Y., and Sheets, H.D., 2011, Biogeography and mass extinction: Extirpation and re-invasion of Normalograptus species (Graptolithina) in the Late Ordovician palaeotropics: Proceedings of the Yorkshire Geological Society, v. 58, p. 227-246, doi:10.1144 /pygs.58.4.300.
137. Gorjan, P., Kaiho, K., Fike, D.A., and Chen, X., 2012, Carbon-and sulfur-isotope geochemistry of the Hirnantian (Late Ordovician) Wangjiawan (Riverside) section, South China: Global correlation and environmental event interpretation: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 337, p. 14-22, doi:10.1016 /j.palaeo.2012.03.021.
138. Gutiérrez-Marco, J.C., and Robardet, M., 1991, Découverte de la zone à Parakidograptus acuminatus (base du Llandovery) dans le Silurien du Synclinorium de Truchas (Zone asturo-léonaise, Nord-Ouest de l'Espagne): Conséquences stratigraphiques et paléogéographiques au passage Ordovicien-Silurien: Comptes Rendus de l'Academie des Sciences de Paris, v. 312, p. 729-734.
139. Gutiérrez-Marco, J.C., and Štorch, P., 1998, Graptolite biostratigraphy of the Lower Silurian (Llandovery) shelf deposits of the western Iberian Cordillera, Spain: Geological Magazine, v. 135, p. 71-92, doi:10.1017 /S0016756897007802.
140. Gutiérrez-Marco, J.C., Ghienne, J.-F., Bernárdez, E., and Hacar, M.P., 2010, Did the Late Ordovician African ice sheet reach Europe?: Geology, v. 38, p. 279-282, doi:10.1130/G30430.1.
141. Hambrey, M.J., and Harland, W.B., 1981, Earth's Pre-Pleistocene Glacial Record: Cambridge, UK, Cambridge University Press, 1004 p.
142. Hammarlund, E.U., Dahl, T.W., Harper, D.A.T., Bond, D.P.G., Nielsen, A.T., Bjerrum, C.J., Schovsbo, N.H., Schönlaub, H.P., Zalasiewicz, J.A., and Canfield, D.E., 2012, A sulfidic driver for the end-Ordovician mass extinction: Earth and Planetary Science Letters, v. 331, p. 128-139, doi:10.1016/j.epsl.2012.02.024.
143. Hamoumi, N., 1999, Upper Ordovician glaciation spreading and its sedimentary record in Moroccan North Gondwana margin: Acta Universitatis Carolinae: Geologica, v. 43, p. 111-114.
144. Haq, B.U., and Schutter, S.R., 2008, A chronology of Paleozoic sea-level changes: Science, v. 322, p. 64-68, doi: 10.1126/science.1161648.
145. Harris, N.B., ed., 2005, The Deposition of Organic Carbon-Rich Sediments: Models, Mechanisms and Consequences: Society for Sedimentary Geology Special Publication 82, 282 p.
146. Hedges, J.I., and Keil, R.G., 1995, Sedimentary organicmatter preservation-An assessment and speculative synthesis-Closing comment: Marine Chemistry, v. 49, p. 137-139, doi:10.1016/0304-4203(95)00013-H.
147. Herrmann, A.D., Haupt, B.J., Patzkowsky, M.E., Seidov, D., and Slingerland, R.L., 2004, Response of Late Ordovician paleoceanography to changes in sea level, continental drift, and atmospheric pCO2: Potential causes for long-term cooling and glaciation: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 210, p. 385-401, doi:10.1016/j.palaeo.2004.02.034.
148. Herrmann, A.D., Macleod, K.G., and Leslie, S.A., 2010, Did a volcanic mega-eruption cause global cooling during the Late Ordovician?: Palaios, v. 25, p. 831-836, doi:10.2110/palo.2010.p10-069r.
149. Herrmann, A.D., Leslie, S.A., and MacLeod, K.G., 2011, Did intense volcanism trigger the first Late Ordovician icehouse?: Comment: Geology, v. 39, e237, doi: 10.1130/G31758C.1.
150. Hetzel, A., Bottcher, M.E., Wortmann, U.G., and Brumsack, H.J., 2009, Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 273, p. 302-328, doi:10.1016 /j.palaeo.2008.11.005.
151. Higgins, M.B., Robinson, R.S., Carter, S.J., and Pearson, A., 2010, Evidence from chlorin nitrogen isotopes for alternating nutrient regimes in the Eastern Mediterranean Sea: Earth and Planetary Science Letters, v. 290, p. 102-107, doi:10.1016/j.epsl.2009.12.009.
152. Hinnov, L.A., and Hilgen, F.J., 2012, Cyclostratigraphy and astrochronology, in Gradstein, F.M., Ogg, J.G., and Smith, A.G., eds., A Geologic Time Scale 2012: Elsevier , p. 63-83.
153. Holland, S.M., and Patzkowsky, M.E., 2007, Gradient ecology of a biotic invasion: Biofacies of the type Cincinnatian series (Upper Ordovician), Cincinnati, Ohio region, USA: Palaios, v. 22, p. 392-407, doi:10.2110 /palo.2006.p06-066r.
154. Holland, S.M., and Patzkowsky, M.E., 2012, Sequence architecture of the Bighorn Dolomite, Wyoming, USA: Transition to the Late Ordovician icehouse: Journal of Sedimentary Research, v. 82, p. 599-615, doi:10.2110 /jsr.2012.52.
155. Holmden, C., Creaser, R.A., Muehlenbachs, K., Leslie, S.A., and Bergström, S.M., 1998, Isotopic evidence for geochemical decoupling between ancient epeiric seas and bordering oceans: Implications for secular curves: Geology, v. 26, p. 567-570, doi:10.1130 /0091-7613(1998)026<0567:IEFGDB>2.3.CO;2.
156. Holmden, C., Panchuk, K., and Finney, S.C., 2012, Tightly coupled records of Ca and C isotope changes during the Hirnantian glaciation in an epeiric sea setting: Geochimica et Cosmochimica Acta, v. 98, p. 94-106, doi:10.1016/j.gca.2012.09.017.
157. Holmden, C., Mitchell, C.E., LaPorte, D.F., Patterson, W.P., Melchin, M.J., and Finney, S.C., 2013, Nd isotope records of Late Ordovician sea-level change-Implications for glaciation frequency and global stratigraphic correlation: Palaeogeography, Palaeoclimatology, Palaeoecology, doi:10.1016/j.palaeo.2013.05.014 (in press).
158. Ingall, E.D., Bustin, R.M., and Van Cappellen, P., 1993, Influence of water column anoxia on the burial and preservation of carbon and phosphorus in marine shales: Geochimica et Cosmochimica Acta, v. 57, p. 303-316, doi:10.1016/0016-7037(93)90433-W.
159. Jaeger, H., 1977, Das Silur/Lochkov-Profil im Franken berger Zwischengebirge (Sachsen): Freiberger Forschungshefte, ser. C, v. 326, p. 45-59.
160. Jaeger, H., and Robardet, M., 1979, Le Silurien et le Dévonien basal dans le nord de la province de Seville (Espagne): Géobios, v. 12, p. 687-714, doi:10.1016 /S0016-6995(79)80097-2.
161. Jaeger, H., Havlícek, V., and Schönlaub, H.P., 1975, Biostratigraphie der Ordovizium/Silur Grenze in den Südalpen-Ein Beitrag zur Diskussion um die Hirnantia-Fauna: Verhandlungen der Geologischen Bundesan stalt, v. 1975, p. 271-289.
162. Jenkyns, H.C., 2010, Geochemistry of oceanic anoxic events: Geochemistry Geophysics Geosystems, v. 11, p. 1-30, doi:10.1029/2009GC002788.
163. Jia, T., 2006, Nitrogen isotope fractionations during progressive metamorphism: A case study from the Paleozoic Cooma metasedimentary complex, southeastern Australia: Geochimica et Cosmochimica Acta, v. 70, p. 5201-5214, doi:10.1016/j.gca.2006.08.004.
164. Jiang, L., Schofield, O.M.E., and Falkowski, P.G., 2005, Adaptive evolution of phytoplankton cell size: American Naturalist, v. 166, p. 496-505.
165. Jimenéz-Sánchez, A., and Villas, E., 2010, The bryozoan dispersion into the Mediterranean margin of Gondwana during the pre-glacial Late Ordovician: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 294, p. 220-231, doi:10.1016/j.palaeo.2009.11.027.
166. Jin, J., and Zhan, R., 2008, Late Ordovician Orthide and Billingsellide Brachiopods from Anticosti Island, Eastern Canada: Diversity Change through Mass Extinction: Ottawa, Canada, National Research Council of Canada Research Press, 151 p.
167. Johnson, M.E., 2010, Tracking Silurian eustasy: Alignment of empirical evidence or pursuit of deductive reasoning?: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 276-284, doi:10.1016/j.palaeo.2009 .11.024.
168. Jones, D.S., and Fike, D.A., 2013, Dynamic sulfur and carbon cycling through the end-Ordovician extinction revealed by paired sulfate-pyrite delta S-34: Earth and Planetary Science Letters, v. 363, p. 144-155, doi: 10.1016/j.epsl.2012.12.015.
169. Jones, D.S., Fike, D.A., Finnegan, S., Fischer, W.W., Schrag, D.P., and McCay, D., 2011, Terminal Ordovician carbon isotope stratigraphy and glacioeustatic sea-level change across Anticosti Island (Quebec, Canada): Geological Society of America Bulletin, v. 123, p. 1645- 1664, doi:10.1130/B30323.1.
170. Jones Crafford, A.E., 2008, Paleozoic tectonic domains of Nevada: An interpretive discussion to accompany the geologic map of Nevada: Geosphere, v. 4, p. 260-291, doi:10.1130/GES00108.1.
171. Junium, C.K., and Arthur, M.A., 2007, Nitrogen cycling during the Cretaceous, Cenomanian-Turonian oceanic anoxic event II: Geochemistry Geophysics Geosystems, v. 8, p. 1-18, doi:10.1029/2006GC001328.
172. Jux, U., and Manze, U., 1979, Glazialeustatisch gesteuerte Sedimentationsablufeauf dem kaledonischen Schelf (Mittelschweden) an der WendeOrdovizium-Silur: Neues Jahrbuch für Geologie und Paläontologie, Monatshefte, v. 1979, p. 155-180.
173. Kaljo, D., and Martma, T., 2011, Carbon isotope trend in the Mirny Creek area, NE Russia, its specific features and possible implications of the uppermost Ordovi cian stratigraphy, in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geologico y Minero de España, Madrid, Spain, v. 14, p. 267-273.
174. Kaljo, D., Kiipli, T., and Martma, T., 1998, Correlation of carbon isotope events and environmental cyclicity in the East Baltic Silurian, in Landing, E., and Johnson, M.E., eds., Silurian Cycles: Linkages of Dynamic Stratigraphy with Atmospheric, Oceanic, and Tectonic Changes, James Hall Centennial Volume: Albany, New York, New York State Museum, p. 297-312.
175. Kaljo, D., Hints, L., Hints, O., Mannik, P., Martma, T., and Nolvak, J., 2011, Katian prelude to the Hirnantian (Late Ordovician) mass extinction: A Baltic perspective: Geological Journal, v. 46, p. 464-477.
176. Kaljo, D., Mannik, P., Martma, T., and Nolvak, J., 2012, More about the Ordovician-Silurian transition beds at Mirny Creek, Omulev Mountains, NE Russia: Carbon isotopes and conodonts: Estonian Journal of Earth Sciences, v. 61, p. 277-294, doi:10.3176/earth.2012.4.07.
177. Kanygin, A., Dronov, A., Timokhin, A., and Gonta, T., 2010, Depositional sequences and palaeoceanographic change in the Ordovician of the Siberian craton: Palaeo geography, Palaeoclimatology, Palaeoecology, v. 296, p. 285-296, doi:10.1016/j.palaeo.2010.02.014.
178. Kidder, D.L., and Worsley, T.R., 2010, Phanerozoic large igneous provinces (LIPs), HEATT (haline euxinic acidic thermal transgression) episodes, and mass extinctions: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 295, p. 162-191, doi:10.1016/j.palaeo.2010.05.036.
179. Kiipli, E., and Kiipli, T., 2013, Nitrogen isotopes in kukersite and black shale implying Ordovician-Silurian seawater redox conditions: Oil Shale, v. 30, p. 60-75, doi:10.3176/oil.2013.1.06.
180. Klemme, H.D., and Ulmishek, G.F., 1991, Effective petroleum source rocks of the world-Stratigraphic distribution and controlling depositional factors: American Association of Petroleum Geologists Bulletin, v. 75, p. 1809-1851.
181. Klug, C., Kroger, B., Kiessling, W., Mullins, G.L., Servais, T., Frỳda, J., Korn, D., and Turner, S., 2010, The Devonian nekton revolution: Lethaia, v. 43, p. 465-477, doi:10.1111/j.1502-3931.2009.00206.x.
182. Koren', T.N., and Melchin, M.J., 2000, Lowermost Silurian graptolites from the Kurama Range, eastern Uzbekistan: Journal of Paleontology, v. 74, p. 1093-1113, doi:10.1666 /0022-3360(2000)074<1093:LSGFTK>2.0.CO;2.
183. Koren', T.N., and Rickards, R.B., 1996, Taxonomy and Evolution of Llandovery Biserial Graptoloids from the Southern Urals, Western Kazakhstan: Palaeontological Association Special Papers in Palaeontology 54, 103 p.
184. Koren', T.N., and Rickards, R.B., 2004, An unusually diverse Llandovery (Silurian) diplograptid fauna from the Southern Urals of Russia and its evolutionary signifi-cance: Palaeontology, v. 47, p. 859-918, doi:10.1111 /j.0031-0239.2004.00411.x.
185. Koren', T.N., and Sobolevskaya, R.F., 1999, Facies and faunal diversity across the Ordovician-Silurian boundary in the Asian part of Russia and adjacent territories: Acta Universitatis Carolinae: Geologica, v. 43, p. 213-215.
186. Koren', T.N., and Sobolevskaya, R.F., 2008, The regional stratotype section and point for the base of the Hirnantian Stage (the uppermost Ordovician) at Mirny Creek, Omulev Mountains: Northeast Russia: Estonian Journal of Earth Sciences, v. 57, p. 1-10, doi:10.3176 /earth.2008.1.01.
187. Koren', T.N., Oradovskaya, M.M., Sobolevskaya, R.F., Pylma , L.J., and Chugaeva, M.N., 1983, The Ordovi cian and Silurian Boundary in the Northeast of the USSR: Leningrad, Nauka, Publishers Leningrad Branch, Interdepartmental Stratigraphic Committee of USSR, 205 p. (in Russian).
188. Koren', T.N., Ahlberg, P., and Nielsen, A.T., 2003a, The post-persculptus and pre-ascensus graptolite fauna in Scania, south-western Sweden: Ordovician or Silurian?, in Ortega, G., and Aceolaza, G.F., eds., Proceedings of the 7th International Graptolite Conference & Field Meeting of the International Subcommission on Silurian Stratigraphy, Volume 18: Tucumn, Argentina, Comunicarte Editorial, p. 133-138.
189. Koren', T.N., Popov, L.E., and Degtjarev, K.E., Kovalevsky, O., and Modzalevskay, T., 2003b, Kazakhstan in the Silurian, in Landing, E., and Johnson, M.E., eds., Silurian Lands and Seas, Paleogeography Outside of Laurentia: New York State Museum Bulletin 493, p. 323-343.
190. Kozlu, H., and Ghienne, J.-F., 2012, Ordovician, in Göncüoglu, M.C., and Bozdogan, N., eds., Paleozoic of Northern Gondwana and its Petroleum Potential: A Field Workshop, 09-14 September 2012, Kayseri, Turkey; "Paleozoic of Eastern Taurides" Guidebook Volume: Ankara, Turkey, Turkish Association of Petroleum Geologists Special Publication 7, p. 42-60.
191. Kremer, B., and Kamierczak, J., 2005, Cyanobacterial mats from Silurian black radiolarian cherts: Phototrophic life at the edge of darkness?: Journal of Sedimentary Research, v. 75, p. 897-904, doi:10.2110/jsr.2005.069.
192. Krug, A.Z., and Patzkowski, M.E., 2007, Geographic variation in turnover and recovery from the Late Ordovician mass extinction: Paleobiology, v. 33, p. 435-454, doi:10.1666/06039.1.
193. Kump, L.R., and Arthur, M.A., 1999, Interpreting carbonisotope excursions: Carbonates and organic matter: Chemical Geology, v. 161, p. 181-198, doi:10.1016 /S0009-2541(99)00086-8.
194. Kump, L.R., Arthur, M.A., Patzkowsky, M.E., Gibbs, M.T., Pinkus, D.S., and Sheehan, P.M., 1999, A weathering hypothesis for glaciation at high atmospheric pCO2 during the Late Ordovician: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 152, p. 173-187, doi: 10.1016/S0031-0182(99)00046-2.
195. Kumpulainen, R.A., 2007, The Ordovician glaciation in Eritrea and Ethiopia, NE Africa, in Hambrey, M.J., Christoffersen, P., Glasser, N.F., and Hubbard, B., eds., Glacial Sedimentary Processes and Products: International Association of Sedimentologists Special Publication 39, p. 295-319.
196. Kuypers, M.M.M., van Breugel, Y., Schouten, S., Erba, E., and Damste, J.S.S., 2004, N2-fixing cyanobacteria supplied nutrient N for Cretaceous oceanic anoxic events: Geology, v. 32, p. 853-856, doi:10.1130/G20458.1.
197. Lakova, I., and Sacanski, V., 2004, Cryptospores and trilete spores in oceanic graptolite-bearing sediments (Saltar Formation) across the Ordovician-Silurian boundary in the West Balkan Mountains, Bulgaria: Review of the Bulgarian Geological Society, v. 65, p. 151-156.
198. Landing, E., 2011, Time-specific black mudstones and global hyperwarming on the Cambrian-Ordovician slope and shelf of the Laurentia palaeocontinent: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 367-368, p. 256-272, doi:10.1016/j.palaeo.2011.09.005.
199. LaPorte, D.F., Holmden, C., Patterson, W.P., Loxton, J.D., Melchin, M.J., Mitchell, C.E., Finney, S.C., and Sheets, H.D., 2009, Local and global perspectives on carbon and nitrogen cycling during the Hirnantian glaciation: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 276, p. 182-195, doi:10.1016/j.palaeo.2009.03.009.
200. Lefebvre, V., Servais, T., Francois, L., and Averbuch, O., 2010, Did a Katian large igneous province trigger the Late Ordovician glaciation? A hypothesis tested with a carbon cycle model: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 310-319, doi:10.1016 /j.palaeo.2010.04.010.
201. Leggett, J.K., 1980, British Lower Palaeozoic black shales and their palaeooceanographic significance: Journal of the Geological Society of London, v. 137, p. 139-156, doi:10.1144/gsjgs.137.2.0139.
202. Legrand, P., 1988, The Ordovician-Silurian boundary in the Algerian Sahara, in Cocks, L.R.M., and Rickards, R.B., eds., A Global Analysis of the Ordovician-Silu rian Boundary: Bulletin of the British Museum of Natural History (Geology), v. 43, p. 171-176.
203. Legrand, P., 1993, Graptolites d'âge ashgillien dans la région de Chirfa (Djado, République du Niger): Bulletin des Centres de Recherches Exploration-Production Elf-Aquitaine, v. 17, p. 435-442.
204. Legrand, P., 2000, Une région de référence pour la limite Ordo vicien-Silurien: l'Oued In Djerane, Sahara algérien: Comptes Rendus de l'Académie des Sciences, Série 2: Sciences de la Terre et des Planètes, v. 330, p. 61-66.
205. Le Heron, D.P., and Dowdeswell, J.A., 2009, Calculating ice volumes and ice flux to constrain the dimensions of a 440 Ma North African ice sheet: Journal of the Geological Society of London, v. 166, p. 277-281, doi:10.1144/0016-76492008-087.
206. Le Heron, D.P., Craig, J., and Etienne, J.L., 2009, Ancient glaciations and hydrocarbon accumulations in North Africa and the Middle East: Earth-Science Reviews, v. 93, p. 47-76, doi:10.1016/j.earscirev.2009.02.001.
207. Le Heron, D.P., Armstrong, H.A., Wilson, C., Howard, J.P., and Gindre, L., 2010, Glaciation and deglaciation of the Libyan Desert: The Late Ordovician record: Sedimentary Geology, v. 223, p. 100-125, doi:10.1016 /j.sedgeo.2009.11.002.
208. Le Heron, D.P., Meinhold, G., Page, A., and Whitham, A., 2013, Did lingering ice sheets moderate anoxia in the early Palaeozoic of Libya?: Journal of the Geological Society of London, v. 170, p. 327-339, doi:10.1144 /jgs2012-108.
209. Lehnert, O., Eriksson, M.J., Calner, M., Joachimski, M., and Buggisch, W., 2007, Concurrent sedimentary and isotopic indications for global climatic cooling in the Late Silurian: Acta Palaeontologica Sinica, v. 46, p. 249-255.
210. Lehnert, O., Mannik, P., Joachimski, M.M., Calner, M., and Fryda, J., 2010, Palaeoclimate perturbations before the Sheinwoodian glaciation: A trigger for extinctions during the 'Ireviken Event': Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 320-331, doi:10.1016/j.palaeo.2010.01.009.
211. Lenton, T.M., Crouch, M., Johnson, M., Pires, N., and Dolan, L., 2012, First plants cooled the Ordovician: Nature Geoscience, v. 5, p. 86-89, doi:10.1038/ngeo1390.
212. Leone, F., Loi, A., Pillola, G.L., and Štorch, P., 2009, The Late Ordovician (Hirnantian) deposits in the Domusnovas area, SW Sardinia, in Corradini, C., Ferretti, A., and Štorch, P., eds., Silurian of Sardinia: Rendiconti della Societa Paleontologica Italiana, v. 3, p. 227-237.
213. Lille, U., 2003, Current knowledge on the origin and structure of Estonian kukersite kerogen: Oil Shale, v. 20, p. 253-263.
214. Logan, G.A., Hayes, J.M., Hieshima, G.B., and Summons, R.E., 1995, Terminal Proterozoic reorganization of biogeochemical cycles: Nature, v. 376, no. 6535, p. 53-56, doi:10.1038/376053a0.
215. Loi, A., Ghienne, J.F., Dabard, M.P., Paris, F., Botquelen, A., Christ, N., Elaouad-Debbaj, Z., Gorini, A., Vidal, M., Videt, B., and Destombes, J., 2010, The Late Ordovician glacio-eustatic record from a high-latitude stormdominated shelf succession: The Bou Ingarf section (Anti-Atlas, southern Morocco): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 332-358, doi:10.1016/j.palaeo.2010.01.018.
216. Loydell, D., 2007, Graptolites from the Upper Ordovician and Lower Silurian of Jordan: Palaeontological Association Special Papers in Palaeontology 78, 66 p.
217. Loydell, D.K., 2012, Graptolite biostratigraphy of the E1- NC174 core, Rhuddanian (lower Llandovery, Silurian), Murzuq Basin, Libya: Bulletin of Geosciences, v. 87, doi:10.3140/bullgeosci.1311.
218. Loydell, D.K., Butcher, A., Fryda, J., Lüning, S., and Fowler, M., 2009, Lower Silurian "hot shales" in Jordan: A new depositional model: Journal of Petroleum Geology, v. 32, p. 261-270, doi:10.1111/j.1747-5457.2009.00447.x.
219. Lüning, S., Craig, J., Loydell, D.K., Štorch, P., and Fitches, B., 2000, Lower Silurian 'hot shales' in North Africa and Arabia: Regional distribution and depositional model: Earth-Science Reviews, v. 49, p. 121-200, doi: 10.1016/S0012-8252(99)00060-4.
220. Lüning, S., Archer, R., Graig, J., and Loydell, D.K., 2003, The Lower Silurian hot shales and double hot shales in North Africa and Arabia, in Salem, M.J., Oun, K.M., and Seddiq, H.M., eds., The Geology of Northwest Libya (Ghadamis, Jifarah, Tarabulus and Sabratah Basins ), Volume 3: Tripoli, Libya, Earth Science Society of Libya, p. 91-105.
221. Lüning, S., Shahin, Y.M., Loydell, D., Al-Rabi, H.T., Masri, A., Tarawneh, B., and Kolonic, S., 2005, Anatomy of a world-class source rock: Distribution and depositional model of Silurian organic-rich shales in Jordan and implications for hydrocarbon potential: American Association of Petroleum Geologists Bulletin, v. 89, p. 1397-1427, doi:10.1306/05250505014.
222. Lüning, S., Loydell, D.K., Štorch, P., Shahin, Y., and Craig, J., 2006, Origin, sequence stratigraphy and depositional environment of an Upper Ordovician (Hirnantian) deglacial black shale, Jordan-Discussion: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 230, p. 352-355, doi:10.1016/j.palaeo.2005.10.004.
223. Lyons, T.W., Anbar, A.D., Severmann, S., Scott, C., and Gill, B.C., 2009, Tracking euxinia in the ancient ocean: A multiproxy perspective and Proterozoic case study: Annual Review of Earth and Planetary Sciences, v. 37, p. 507-534, doi:10.1146/annurev .earth.36.031207.124233.
224. Marshall, J.D., and Middleton, P.D., 1990, Changes in marine isotopic composition in the Late Ordovician glaciation: Journal of the Geological Society of London, v. 147, p. 1-4, doi:10.1144/gsjgs.147.1.0001.
225. Masiak, M., Podhalanska, T., and Stempien-Salek, M., 2003, Ordovician-Silurian boundary in the Bardo syncline, Holy Cross Mountains, Poland-New data on fossil assemblages and sedimentary succession: Geological Quarterly, v. 47, p. 311-330.
226. McCracken, A.D., and Nowlan, G.S., 1988, The Gamachian Stage and Fauna 13, in Landing, E., New York State Museum Bulletin, no. 462 (1986); Proceedings of the Canadian Paleontology and Biostratigraphy Seminar, Albany, September 26-29 1988, p. 71-79.
227. McGhee, G.R., Jr., Sheehan, P.M., Bottjer, D.J., and Droser, M.L., 2004, Ecological ranking of Phanerozoic biodiversity crises: Ecological and taxonomic severities are decoupled: Palaeogeography, Palaeoclimatology, Palaeo ecology, v. 211, p. 289-297, doi:10.1016/j.palaeo .2004.05.010.
228. McGhee, G.R., Jr., Sheehan, P.M., Bottjer, D.J., and Droser , M.L., 2012, Ecological ranking of Phanerozoic biodiversity crises: The Serpukhovian (early Carboniferous) crisis had a greater ecological impact than the end-Ordovician: Geology, v. 40, no. 2, p. 147-150, doi:10.1130/G32679.1.
229. Melchin, M.J., 1989, Llandovery graptolite biostratigraphy and paleobiogeography, Cape Phillips Formation, Canadian Arctic Islands: Canadian Journal of Earth Sciences, v. 26, p. 1726-1746, doi:10.1139/e89-147.
230. Melchin, M.J., 2008, Restudy of some Ordovician-Silurian boundary graptolites from Anticosti Island, Canada, and their biostratigraphic significance: Lethaia, v. 41, p. 155-162, doi:10.1111/j.1502-3931.2007.00045.x.
231. Melchin, M.J., and Holmden, C., 2006a, Carbon isotope chemostratigraphy in Arctic Canada: Sea-level forcing of carbonate platform weathering and implications for Hirnantian global correlation: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 234, p. 186-200, doi:10.1016/j.palaeo.2005.10.009.
232. Melchin, M.J., and Holmden, C., 2006b, Carbon isotope chemostratigraphy of the Llandovery in Arctic Canada: Implications for global correlation and sealevel change: GFF, v. 128, p. 173-180, doi:10.1080 /11035890601282173.
233. Melchin, M.J., and Mitchell, C.E., 1991, Late Ordovician extinction in the Graptoloidea, in Barnes, C.R., and Williams, S.H., eds., Advances in Ordovician Geology: Geological Survey of Canada Paper 90-9, p. 143-156.
234. Melchin, M.J., McCracken, A.D., and Oliff, F.J., 1991, The Ordovician-Silurian boundary on Cornwallis and Truro Islands, Arctic Canada: Preliminary data: Canadian Journal of Earth Sciences, v. 28, p. 1854-1862, doi:10.1139/e91-165.
235. Melchin, M.J., Holmden, C., and Williams, S.H., 2003, Correlation of graptolite biozones, chitinozoan biozones, and carbon isotope curves through the Hirnantian, in Albanesi, G.L., Beresi, M.S., and Peralta, S.H., eds., Ordovician from the Andes, Volume 17: Tucumán, Argen tina, Comunicarte Editorial, p. 101-104.
236. Melchin, M.J., Mitchell, C.E., Naczk-Cameron, A., Fan, J.X., and Loxton, J., 2011, Phylogeny and adaptive radiation of the Neograptina (Graptoloida) during the Hirnantian mass extinction and Silurian recovery: Proceedings of the Yorkshire Geological Society, v. 58, p. 281-309, doi:10.1144/pygs.58.4.301.
237. Melchin, M.J., Sadler, P.M., and Cramer, B.D., 2012, The Silurian Period, in Gradstein, F.M., Ogg, J.G., and Smith, A.G., eds., A Geologic Time Scale 2012: Elsevier , p. 525-558.
238. Melott, A.L., and Thomas, B.C., 2009, Late Ordovician geographic patterns of extinction compared with simulations of astrophysical ionizing radiation damage: Paleobiology, v. 35, p. 311-320, doi:10.1666/0094-8373-35.3.311.
239. Melott, A.L., Lieberman, B.S., Laird, C.M., Martin, L.D., Medvedev, M.V., Thomas, B.C., Cannizzo, J.K., Gehrels , N., and Jackman, C.H., 2004, Did a gammaray burst initiate the Late Ordovician mass extinction?: International Journal of Astrobiology, v. 3, p. 55-61, doi:10.1017/S1473550404001910.
240. Mergl, M., 2011, Earliest occurrence of the Hirnantia fauna in the Prague Basin (Czech Republic): Bulletin of Geosciences, v. 86, no. 1, p. 63-70, doi:10.3140/bull .geosci.1245.
241. Metzger, J.G., and Fike, D.A., 2013, Techniques for assessing spatial heterogeneity of carbonate 13C values: Implications for craton-wide isotope gradients: Sedimentology, doi:10.1111/sed.12033.
242. Meyer, K.M., and Kump, L.R., 2008, Oceanic euxinia in Earth history: Causes and consequences: Annual Review of Earth and Planetary Sciences, v. 36, p. 251- 288, doi:10.1146/annurev.earth.36.031207.124256.
243. Meyers, P.A., and Bernasconi, S.M., 2005, Carbon and nitro gen isotope excursions in mid-Pleistocene sapropels from the Tyrrhenian Basin: Evidence for climate-induced increases in microbial primary production: Marine Geology, v. 220, p. 41-58, doi:10.1016 /j.margeo.2005.07.003.
244. Middleton, P.D., Marshall, J.D., and Brenchley, P.J., 1991, Evidence for isotopic change associated with Late Ordovician glaciation, from brachiopods and marine cements of central Sweden, in Barnes, C.R., and Williams, S.H., eds., Advances in Ordovician Geology: Geological Survey of Canada Paper 90-9, p. 313-323.
245. Mihajlovic, M., 1974, Silurski graptoliti istocne Serbije (Njihov stratigrafski pologaj): Bulletin du Museum d'Histoire Naturelle, Beograd, ser. A, v. 29, 247 p. (In Serbian.)
246. Miller, M.A., and Melvin, J., 2005, Significant new biostratigraphic horizons in the Qusaiba member of the Silurian Qalibah Formation of central Saudi Arabia, and their sedimentological expression in a sequence stratigraphic context: GeoArabia, v. 10, p. 49-92.
247. Mitchell, C.E., and Bergström, S.M., 1991, New graptolite and lithostratigraphic evidence from the Cincinnati region, U.S.A., for the definition and correlation of the base of the Cincinnatian Series (Upper Ordovician), in Barnes, C.R., and Williams, S.H., eds., Advances in Ordovician Geology: Geological Survey of Canada, Paper 90-9, p. 59-77.
248. Mitchell, C.E., Brussa, E.D., Toro, B.A., and Astini, R.A., 1998, Late Ordovician graptolites from the Empozada Formation, Argentine Precordillera, an outer shelf, cool water, peri-Gondwanan assemblage?, in Gutiérrez-Marco, J.C. and Rábano, I., eds, Proceedings Sixth International Graptolite Conference of the GWG (IPA) and the SW Iberia Field Meeting 1998 of the IUGS Subcommission on Silurian Stratigraphy, Madrid, 1998: Instituto Tecnologico Geominero de España Volume 23, p. 224-226.
249. Mitchell, C.E., Sheets, H.D., Belscher, K., Finney, S.C., Holmden, C., LaPorte, D.F., Melchin, M.J., and Patterson, W.P., 2007, Species abundance changes during mass extinction and the inverse Signor-Lipps effect: Apparently abrupt graptolite mass extinction as an artifact of sampling: Acta Palaeontologica Sinica, v. 46, p. 340-346.
250. Mitchell, C.E., Štorch, P., Holmden, C, Melchin, M.J., and Gutiérrez-Marco, J.C., 2011, New stable isotope data and fossils from the Hirnantian Stage in Bohemia and Spain: Implications for correlation and paleoclimate, in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geologico y Minero de España, v. 14, Madrid, Spain, p. 371-378.
251. Mitchell, C.E., Melchin, M.J., Holmden, C., and Finney, S.C., 2012, An alternative international correlation of the Late Ordovician carbon isotope chemostratigraphic record: Implications for latest Ordovician temperature history: Geological Society of America Abstracts with Programs, v. 44, no. 7, p. 124.
252. Möbius, J., Lahajnar, N., and Emeis, K.C., 2010, Diagenetic control of nitrogen isotope ratios in Holocene sapropels and recent sediments from the Eastern Mediterranean Sea: Biogeosciences, v. 7, p. 3901-3914, doi:10.5194 /bg-7-3901-2010.
253. Möbius, J., Gaye, B., Lahajnar, N., Bahlmann, E., and Emeis, K.C., 2011, Influence of diagenesis on sedimentary delta N-15 in the Arabian Sea over the last 130 kyr: Marine Geology, v. 284, p. 127-138, doi:10.1016 /j.margeo.2011.03.013.
254. Monod, O., Kozlu, H., Ghienne, J.-F., Dean, W.T., Gnay, Y., Le Herissé, A., Paris, A., and Robardet, M., 2003, Late Ordovician glaciation in southern Turkey: Terra Nova, v. 15, p. 249-257, doi:10.1046/j.1365 -3121.2003.00495.x.
255. Montenegro, A., Spence, P., Meissner, K.J., Eby, M., Melchin, M.J., and Johnston, S.T., 2011, Climate simulations of the Permian-Triassic boundary: Ocean acidification and the extinction event: Paleoceanography, v. 26, PA3207, doi:10.1029/2010PA002058.
256. Moreau, J., 2011, The Late Ordovician deglaciation sequence of the SW Murzuq Basin (Libya): Basin Research, v. 23, p. 449-477, doi:10.1111/j.1365-2117.2010.00499.x.
257. Mu, E., and Ni, Y., 1983, Uppermost Ordovician and lowermost Silurian graptolites from the Xainza area of Xizang (Tibet) with discussion on the Ordovician-Silurian boundary: Palaeontologica Cathayana, v. 1, p. 155-179.
258. Munnecke, A., Calner, M., Harper, D.A.T., and Servais, T., 2010, Ordovician and Silurian sea-water chemistry, sea level, and climate: A synopsis: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 389-413, doi:10.1016/j.palaeo.2010.08.001.
259. Nardin, E., Godderis, Y., Donnadieu, Y., Le Hir, G., Blakey, R.C., Puceat, E., and Aretz, M., 2011, Modeling the early Paleozoic long-term climatic trend: Geological Society of America Bulletin, v. 123, no. 5-6, p. 1181- 1192, doi:10.1130/B30364.1.
260. Needham, D.T., 2004, Deformation in Moffat Shale detachment zones in the western part of the Scottish Southern Uplands: Geological Magazine, v. 141, p. 441-453, doi:10.1017/S0016756804009203.
261. Negri, A., Ferretti, A., Wagner, T., and Meyers, P.A., 2009, Phanerozoic organic-carbon-rich marine sediments: Overview and future research challenges: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 273, p. 218-227, doi:10.1016/j.palaeo.2008.10.002.
262. Newell, N.D., 1963, Crises in the history of life: Scientific American, v. 208, p. 76-92, doi:10.1038 /scientificamerican0263-76.
263. Newell, N.D., 1967, Revolutions in the history of life, in Albritton , C., ed., Uniformity and Simplicity: Geological Society of America Special Paper 89, p. 63-91.
264. Oliver, G.J.H., 2001, Reconstruction of the Grampian episode in Scotland: Its place in the Caledonian orogeny: Tectonophysics, v. 332, p. 23-49, doi:10.1016 /S0040-1951(00)00248-1.
265. Orchard, M.J., 2007, A proposed Carnian-Norian boundary GSSP at Black Bear Ridge, northeast British Columbia, and a new conodont framework for the boundary interval: Albertiana, v. 36, p. 130-141.
266. Orth, C.J., Gilmore, L.R., Quintana, L.R., and Sheehan, P.M., 1986, Terminal Ordovician extinction: Geochemical analysis of the Ordovician-Silurian boundary, Anticosti Island, Quebec: Geology, v. 14, p. 433-436, doi:10.1130 /0091-7613(1986)14<433:TOEGAO>2.0.CO;2.
267. Ozaki, K., Tajima, S., and Tajika, E., 2011, Conditions required for oceanic anoxia/euxinia: Constraints from a one-dimensional ocean biogeochemical cycle model: Earth and Planetary Science Letters, v. 304, p. 270- 279, doi:10.1016/j.epsl.2011.02.011.
268. Page, A.A., Zalasiewicz, J.A., Williams, M., and Popov, L.E., 2007, Were transgressive black shales a negative feedback modulating glacioeustasy in the early Palaeozoic icehouse?, in Williams, M., Haywood, A.M., Gregory, F.J., and Schmidt, D.N., eds., Deep-Time Perspectives on Climate Change: Marrying the Signal from Computer Models and Biological Proxies: The Micropalaeontological Society Special Publications: London, Geological Society of London, p. 123-156.
269. Palastanga, V., Slomp, C.P., and Heinze, C., 2011, Longterm controls on ocean phosphorus and oxygen in a global biogeochemical model: Global Biogeochemical Cycles, v. 25, 2011, doi:10.1029/2010GB003827.
270. Pancost, R.D., Freeman, K.H., Herrmann, A.D., Patzkowsky, M.E., Ainsaar, L., and Martma, T., 2013, Reconstructing Late Ordovician carbon cycle variations: Geochimica et Cosmochimica Acta, v. 105, p. 433-454, doi:10.1016 /j.gca.2012.11.033.
271. Paris, F., Deynoux, M., and Ghienne, J.-F., 1998, Découverte de Chitinozoaires la limite Ordovicien-Silurien en Mauritanie; implications paléogéographiques: Comptes Rendus de l'Academie des Sciences de Paris, v. 326, p. 499-504.
272. Paris, G., Beaumont, V., Bartolini, A., Clemence, M.E., Gardin, S., and Page, K., 2010, Nitrogen isotope record of a perturbed paleoecosystem in the aftermath of the end-Triassic crisis, Doniford section, SW England: Geochemistry Geophysics Geosystems, v. 11, p. 1-15, doi:10.1029/2010GC003161.
273. Parrish, J.T., 1982, Upwelling and petroleum source with reference to the Palaeozoic: American Association of Petroleum Geologists Bulletin, v. 66, p. 750-774.
274. Pedersen, G.K., 1989, The sedimentology of Lower Palaeozoic black shales from the shallow wells Skelbro 1 and Billegrav 1, Bornholm, Denmark: Bulletin of the Geological Society of Denmark, v. 37, p. 151-173.
275. Phillips, E.R., Evans, J.A., Stone, P., Horstwood, M.S.A., Floyd, J.D., Smith, R.A., Akhurst, M.C., and Barron, H.F., 2003, Detrital Avalonian zircons in the Laurentian Southern Uplands terrane, Scotland: Geol ogy, v. 31, p. 625-628, doi:10.1130/0091-7613(2003)031 <0625:DAZITL>2.0.CO;2.
276. Piçarra, J.M., Štorch, P., Gutiérrez-Marco, J.C., and Oliveira J.T., 1995, Characterization of the Parakidograptus acuminatus graptolite biozone in the Silurian of the Barrancos region (Ossa Morena zone, south Portugal): Comunicações do Instituto Geológico e Mineiro, v. 81, p. 3-8.
277. Piçarra, J.M., Robardet, M., Bourahrouh, A., Paris, F., Pereira, Z., Le Menn, J., Gourvennec, R., Oliveira, T., and Lardeux, H., 2002, Le passage Ordovicien-Silurien et la partie inferieure du Silurien (Sud-Est du Massif armoricain, France): Comptes Rendus de l'Academie des Sciences de Paris, v. 334, p. 1177-1183, doi:10.1016 /S1631-0713(02)01864-3.
278. Piçarra, J.M., Robardet, M., Oliveira, J.T., Paris, F., and Lardeux, H., 2009, Graptolite faunas of the Llandovery phtanites at Les Fresnaies (Chalonnes-sur-Loire, southeastern Armorican Massif): Palaeontology and biostratigraphy: Bulletin of Geosciences, v. 84, p. 41- 50, doi:10.3140/bull.geosci.1085.
279. Podhalanska, T., 1999, The Upper Ordovician and the Lower Silurian in the Peribaltic Depression; stratigraphy and development: Acta Universitatis Carolinae: Geologica, v. 43, p. 221-224.
280. Podhalanska, T., 2003, Late Ordovician to Early Silurian transition and the graptolites from Ordovician/Silurian boundary near the SW rim of the East European craton (northern Poland), in Ortega, G., and Aceñolaza, G.F., eds., Proceedings of the 7th International Graptolite Conference & Field Meeting of the International Subcommission on Silurian Stratigraphy, Volume 18: Tucumán, Argentina, Comunicarte Editorial, p. 165-171.
281. Podhalanska, T., and Trela, W., 2007, Stratigraphy and sedimentary record of the Lower Silurian succession in the southern Holy Cross Mountains, Poland: Acta Palaeontologica Sinica, v. 46, p. 397-401.
282. Pope, M.C., 2004, Cherty carbonate facies of the Montoya Group, southern New Mexico and western Texas, and its regional correlatives: A record of Late Ordovician paleoceanography on southern Laurentia: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 210, p. 367-384, doi:10.1016/j.palaeo.2004.02.035.
283. Pope, M.C., and Steffen, J.B., 2003, Widespread, prolonged late Middle to Late Ordovician upwelling in North America: A proxy record of glaciation?: Geology, v. 31, p. 63-66, doi:10.1130/0091-7613(2003)031<0063: WPLMTL>2.0.CO;2.
284. Popov, L.E., Bassett, M.G., Zhemchuzhnikov, V.G., Holmer, L.E., and Klishevich, I.A., 2009, Gondwanan faunal signatures from early Palaeozoic terranes of Kazakhstan and Central Asia: Evidence and tectonic implications, in Bassett, M.G., ed., Early Palaeozoic Peri-Gondwana Terranes: New Insights from Tectonics and Biogeography: Geological Society of London Special Publication 325, p. 23-64.
285. Potter, P.E., Maynard, J.B., and Depetris, P.J., 2005, Mud and Mudstones: Berlin, Springer, 314 p.
286. Poulton, S.W., and Canfield, D.E., 2011, Ferruginous conditions: A dominant feature of the ocean through Earth's history: Elements, v. 7, p. 107-112.
287. Poussart, P.F., Weaver, A.J., and Barnes, C.R., 1999, Late Ordovician glaciation under high atmospheric CO2: A coupled model analysis: Paleoceanography, v. 14, p. 542-558.
288. Puchkov, V.N., 2009, The evolution of the Uralian orogeny, in Murphy, J.B., Keppie, J.D., and Hynes, A.J., eds., Ancient Orogens and Modern Analogues: Geological Society of London Special Publication 327, p. 161-195.
289. Puchkov, V.N., 2010, Geology of the Urals and Cis-Urals (Actual Problems of Stratigraphy, Tectonics, Geodynamics and Metallogeny): Ufa, DesignPoligraph-Service, 288 p. (in Russian).
290. Rasmussen, C.M.O., and Harper, D.A.T., 2011a, Did the amalgamation of continents drive the end Ordovician mass extinctions?: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 311, p. 48-62, doi:10.1016 /j.palaeo.2011.07.029.
291. Rasmussen, C.M.O., and Harper, D.A.T., 2011b, Interrogation of distributional data for the end Ordovician crisis interval: Where did disaster strike?: Geological Journal, v. 46, p. 478-500.
292. Raup, D.M., and Sepkoski, J.J., Jr., 1982, Mass extinctions in the marine fossil record: Science, v. 215, p. 1501- 1503, doi:10.1126/science.215.4539.1501.
293. Raup, D.M., and Sepkoski, J.J., Jr., 1986, Periodic extinction of families and genera: Science, v. 231, p. 833-836.
294. Rhoads, D. S., and Morse, J. W., 1971, Evolutionary and ecological significance of oxygen-deficient marine basins: Lethaia, v. 4, p. 413-428.
295. Rickards, R.B., 1988, Base of the Silurian in the Lake District and Howgill Fells, Northern England: Bulletin of the British Museum (Natural History) Historical Series, v. 43, p. 53-57.
296. Robardet, M., and Doré, F., 1988, The Late Ordovician diamictic formations from southwestern Europe: North Gondwana glaciomarine deposits: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 66, p. 19-31, doi: 10.1016/0031-0182(88)90078-8.
297. Robinson, R.S., Kienast, M., Albuquerque, A.L., Altabet, M., Contreras, S., Holz, R.D., Dubois, N., Francois, R., Galbraith, E., Hsu, T.C., Ivanochko, T., Jaccard, S., Kao, S.J., Kiefer, T., Kienast, S., Lehmann, M.F., Martinez, P., McCarthy, M., Möbius, J., Pedersen, T., Quan, T.M., Ryabenko, E., Schmittner, A., Schneider, R., Schneider-Mor, A., Shigemitsu, M., Sinclair, D., Somes, C., Studer, A., Thunell, R., and Yang, J.Y., 2012, A review of nitrogen isotopic alteration in marine sediments: Paleoceanography, v. 27, PA4203, doi:10.1029/2012PA002321.
298. Rohrssen, M., Love, G.D., Fischer, W., Finnegan, S., and Fike, D.A., 2012, Lipid biomarkers record fundamental changes in the microbial community structure of tropical seas during the Late Ordovician Hirnantian glaciation: Geology, v. 41, p. 127-130, doi:10.1130 /G33671.1.
299. Rong, J.Y., and Chen, X., 1987, Faunal differentiation, biofacies and lithofacies patterns of Late Ordovician (Ashgillian) in southern China: Acta Palaeontologica Sinica, v. 26, p. 507-535.
300. Rong, J.Y., Boucot, A.J., Harper, D.A.T., Zhan, R.B., and Neuman, R.B., 2006, Global analyses of brachiopod faunas through the Ordovician and Silurian transition: Reducing the role of the Lazarus effect: Canadian Journal of Earth Sciences, v. 43, p. 23-39, doi:10.1139 /e05-089.
301. Rosenau, N.A., Herrmann, A.D., and Leslie, S.A., 2012, Conodont apatite d18O values from a platform margin setting, Oklahoma, USA: Implications for initiation of Late Ordovician icehouse conditions: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 315, p. 172-180, doi:10.1016/j.palaeo.2011.12.003.
302. Rothwell Group, LP., 2011, PaleoGIS/Arcview 4.0, PALEOMAP Project: Arlington, Texas, University of Texas at Arlington.
303. Sacanski, V.V., 1993, Boundaries of the Silurian System in Bulgaria defined by graptolites: Geologica Balcanica, v. 23, p. 25-33.
304. Sacanski, V.V., 1994, Age assessment of the Cerecel and Sirman formations in Sofia Stara Planina Mountain (Ordovician, Ashgill): Review of the Bulgarian Geological Society, v. 55, p. 83-90.
305. Sacanski, V.V., and Tencov, J., 1993, Lithostratigraphic subdivision of the Silurian deposits in the Svoge anticline: Review of the Bulgarian Geological Society, v. 54, p. 71-81.
306. Sadler, P.M., Cooper, R.A., and Melchin, M.J., 2011, Sequencing the graptoloid clade: Building a global diversity curve from local range charts, regional composites and global time-lines: Proceedings of the Yorkshire Geological Society, v. 58, p. 329-343, doi:10.1144 /pygs.58.4.296.
307. Saltzman, M.R., 2005, Phosphorus, nitrogen, and the redox evolution of the Paleozoic oceans: Geology, v. 33, p. 573-576, doi:10.1130/G21535.1.
308. Saltzman, M.R., and Young, S.A., 2005, Long-lived glaciation in the Late Ordovician? Isotopic and sequencestratigraphic evidence from western Laurentia: Geology, v. 33, p. 109-112, doi:10.1130/G21219.1.
309. Sawaki, Y., Shibuya, T., Kawai, T., Komiya, T., Omori, S., Iizuka, T., Hirata, T., Windley, B.F., and Maruyama, S., 2010, Imbricated ocean-plate stratigraphy and U-Pb zircon ages from tuff beds in cherts in the Ballantrae complex, SW Scotland: Geological Society of America Bulletin, v. 122, p. 454-464, doi:10.1130/B26329.1.
310. Schauer, M., 1971, Biostratigraphie und Taxionomie der Graptolithen des tieferen Silurs unter besonderer Berücksichtigung der tektonischen Deformation: Freiberger Forschungshefte, ser. C, v. 273, p. 1-185.
311. Schlanger, S.O., and Jenkyns, H.C., 1976, Cretaceous oceanic anoxic events: Causes and consequences: Geologie en Mijnbouw, v. 55, p. 179-184.
312. Schönian, F., and Egenhoff, S.O., 2007, A Late Ordovician ice sheet in South America: Evidence from the Cancairi tillites, southern Bolivia, in Linnemann, U., Nance, R.D., Kraft, P., and Zulauf, G., eds., The Evolution of the Rheic Ocean: Geological Society of America Special Paper 423, p. 525-548.
313. Schönlaub, H.P., Ferretti, A., Gaggero, L., Hammarlund, E., Harper, D.A.T., Histon, K., Priewalder, H., Spötl, C., and Štorch, P., 2011, The Late Ordovician glacial event in the Carnic Alps (Austria), in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geologico y Minero de España: Madrid, Spain, v. 14, p. 515-526.
314. Schopf, T.J.M., 1974, Permo-Triassic extinctions: Relation to sea-floor spreading: The Journal of Geology, v. 82, p. 129-143, doi:10.1086/627955.
315. Sell, B.K., 2011, Intense volcanism and Ordovician icehouse climate, in Gutiérrez-Marco, J.C., Rábano, I., and García-Bellido, D., eds., Ordovician of the World: Cuadernos del Museo Geominero, Instituto Geologico y Minero de España, Madrid, Spain, v. 14, p. 527-536.
316. Sennikov, N.V., Yolkin, E.A., Petrunina, Z.E., Gladkikh, L.A., Obut, O.T., Izokh, N.G., and Kipriyanova, T.P., 2008, Ordovician-Silurian Biostratigraphy and Paleogeography of the Gorny Altay: Novosibirsk, Russia, Publishing House SB RAS, 156 p.
317. Sephton, M.A., Amor, K., Franchi, I.A., Wignall, P.B., Newton, R., and Zonneveld, J.P., 2002, Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event: Geology, v. 30, p. 1119-1122, doi:10.1130/0091-7613(2002)030<1119:CANIDA>2.0 .CO;2.
318. Sepkoski, J.J., Jr., 1986, Global bioevents and the question of periodicity, in Walliser, O., ed., Global Bio-Events, Volume 8: Berlin, Springer-Verlag, p. 47-61.
319. Severmann, S., and Anbar, A.D., 2009, Reconstructing paleo redox conditions through a multitracer approach: The key to the past is the present: Elements, v. 5, p. 359-364, doi:10.2113/gselements.5.6.359.
320. Sheehan, P.M., 1973, The relation of the Late Ordovician glaciation to the Ordovician-Silurian changeover in North American brachiopod faunas: Lethaia, v. 6, p. 146-154, doi:10.1111/j.1502-3931.1973.tb01188.x.
321. Sheehan, P.M., 1975, Brachiopod synecology in a time of crisis (Late Ordovician-Early Silurian): Paleobiology, v. 1, p. 205-212.
322. Sheehan, P.M., 1979, Swedish Late Ordovician marine benthic assemblages and their bearing on brachiopod zoogeography, in Gray, J., and Boucot, A.J., eds., His torical Biogeography, Plate Tectonics, and the Changing Environment: Corvallis, Oregon, Oregon State University Press, p. 61-73.
323. Sheehan, P.M., 2001, The Late Ordovician mass extinction: Annual Review of Earth and Planetary Sciences, v. 29, p. 331-364, doi:10.1146/annurev.earth.29.1.331.
324. Shen, Y.N., Canfield, D.E., and Knoll, A.H., 2002, Middle Proterozoic ocean chemistry: Evidence from the McArthur Basin, northern Australia: American Journal of Science, v. 302, p. 81-109, doi:10.2475/ajs .302.2.81.
325. Shields, G.A., Carden, G.A.F., Veizer, J., Meidla, T., Rong, J.Y., and Li, R.Y., 2003, Sr, C, and O isotope geochemistry of Ordovician brachiopods: A major isotopic event around the Middle-Late Ordovician transition: Geochimica et Cosmochimica Acta, v. 67, p. 2005- 2025, doi:10.1016/S0016-7037(02)01116-X.
326. Siddall, M., Kaplan, M.R., Schaefer, J.M., Putnam, A., Kelly, M.A., and Goehring, B., 2010, Changing influence of Antarctic and Greenlandic temperature records on sea-level over the last glacial cycle: Quaternary Science Reviews, v. 29, p. 410-423, doi:10.1016 /j.quascirev.2009.11.007.
327. Simberloff, D.S., 1974, Permo-Triassic extinctions: Effects of area on biotic equilibrium: The Journal of Geology, v. 82, p. 267-274, doi:10.1086/627962.
328. Sinninghe Damsté, J.S., and Köster, J., 1998, A euxinic southern North Atlantic Ocean during the Cenomanian/ Turonian oceanic anoxic event: Earth and Planetary Science Letters, v. 158, p. 165-173, doi:10.1016 /S0012-821X(98)00052-1.
329. Skevington, D., 1974, Controls influencing the composition and distribution of Ordovician graptolite faunal provinces, in Rickards, R.B., Jackson, D.E., and Hughes, C.P., eds., Graptolite Studies in Honour of O.M.B. Bulman: London, The Palaeontological Association, p. 59-73.
330. Slomp, C.P., and Van Cappellen, P., 2007, The global marine phosphorus cycle: Sensitivity to oceanic circulation: Biogeosciences, v. 4, p. 155-171, doi:10.5194 /bg-4-155-2007.
331. Sobolevskaya, R.F., 2011, Atlas of the Palaeozoic Fauna- Taimyr. Part II. The Ordovician-Silurian Graptolites: FGUP, I.S. Gramberg VNIIOkeangeologia, 283 p. (in Russian).
332. Stanley, S.M., 2010, Relation of Phanerozoic stable isotope excursions to climate, bacterial metabolism, and major extinctions: Proceedings of the National Academy of Sciences of the United States of America, v. 107, p. 19,185-19,189, doi:10.1073/pnas.1012833107.
333. Stanley, S.M., and Powell, M.G., 2003, Depressed rates of origination and extinction during the late Paleozoic ice age: A new state for the global marine ecosystem: Geology, v. 31, p. 877-880, doi:10.1130/G19654R.1.
334. Stein, V., 1965, Stratigraphische und palontologische Untersuchungen im Silur des Frankenwaldes: Neues Jahrbuch für Geologie und Paläontologie: Abhandlungen, v. 121, p. 111-200.
335. Stone, P., 1995, Geology of the Rhins of Galloway district: Memoir of the British Geological Survey, sheets 1 and 3 (Keyworth, England), 102 p.
336. Stone, P., and Merriman, R.J., 2004, Basin thermal history favours an accretionary origin for the Southern Uplands terrane, Scottish Caledonides: Journal of the Geological Society of London, v. 161, p. 829-836, doi:10.1144/0016-764903-170.
337. Stone, P., Rigby, S., and Rushton, A.W.A., 2003, Advances in Scottish graptolite biostratigraphy: An introduction: Scottish Journal of Geology, v. 39, p. 11-15.
338. Štorch, P., 1990, Upper Ordovician-Lower Silurian sequences of the Bohemian Massif, central Europe: Geological Magazine, v. 127, p. 225-239.
339. Štorch, P., 2006, Facies development, depositional settings and sequence stratigraphy across the Ordovician-Silurian boundary: A new perspective from the Barrandian area of the Czech Republic: Geological Journal, v. 41, p. 163-192.
340. Štorch, P., and Feist, R., 2008, Lowermost Silurian graptolites of Montagne Noire, France: Journal of Paleontology, v. 82, p. 938-956.
341. Štorch, P., and Mergl, M., 1989, Krlodvor/Kosov boundary and the Late Ordovician environmental changes in the Prague Basin (Barrandian, Bohemia): Sborník geologickỳch ved, Geologie, v. 44, p. 117-153.
342. Štorch, P., and Schönlaub, H.-P., 2012, Ordovician-Silurian boundary graptolites of the southern Alps, Austria: Bulletin of Geosciences. doi:10.3140/bull.geosci.
343. Štorch, P., and Serpagli, E., 1993, Lower Silurian graptolites from southwestern Sardinia: Bolletino della Societa Paleontologia Italiana, v. 32, p. 3-57.
344. Štorch, P., Gutiérrez-Marco, J.C., Sarmiento, G.N., and Rábano, I., 1998, Upper Ordovician and Lower Silurian of Corral de Calatrava, southern part of the Central Iberian zone, in Gutiérrez-Marco, J.C., and Rábano, I., eds., Proceedings of the Sixth International Graptolite Conference of the GWG (IPA) and the SW Iberia Field Meeting 1998 of the International Subcommission on Silurian Stratigraphy (ICS-IUGS): Madrid, Temas Geológico-Mineros ITGE, v. 23, p. 319-325.
345. Štorch, P., Mitchell, C.E., Finney, S.C., and Melchin, M.J., 2011, Uppermost Ordovician (upper Katian-Hirnantian) graptolites of north-central Nevada, USA: Bulletin of Geosciences, v. 86, p. 301-386.
346. Strachan, R.A., 2012, Mid-Ordovician to Silurian subduction and collision: Closure of the Iapetus Ocean, in Woodcock, N.H., and Strachan, R.A., eds., Geological History of Britain and Ireland (2nd ed.): Wiley-Blackwell, 423 p.
347. Strauss, H., 2006, Anoxia through Time, in Neretin, L.N., ed., Past and Present Water Column Anoxia: NATO Science Series, IV: Earth and Environmental Sciences, Volume 64, p. 3-19.
348. Su, W.B., Huff, W.D., Ettensohn, F.R., Liu, X.M., Zhang, J.E., and Li, Z.M., 2009, K-bentonite, black-shale and flysch successions at the Ordovician-Silurian transition, South China: Possible sedimentary responses to the accretion of Cathaysia to the Yangtze block and its implications for the evolution of Gondwana: Gondwana Research, v. 15, p. 111-130, doi:10.1016/j.gr .2008.06.004.
349. Sutcliffe, O.E., Dowdeswell, J.A., Whittington, R.J., Theron, J.N., and Craig, J., 2000, Calibrating the Late Ordovician glaciation and mass extinction by the eccentricity cycles of Earth's orbit: Geology, v. 28, p. 967-970, doi:10.1130/0091-7613(2000)28<967:CTLOGA>2.0 .CO;2.
350. Sweet, W.C., 2000, Conodonts and biostratigraphy of Upper Ordovician strata along a shelf to basin transect in central Nevada: Journal of Paleontology, v. 74, p. 1148-1160, doi:10.1666/0022-3360(2000)074<1148: CABOUO>2.0.CO;2.
351. Tasáryová, Z., Pruner, P., Manda, Janoušek, V., Schnabl, P., Štorch, P., Frỳda, J., Šifnerová, K., and Erban, V., 2012, Perunica microplate in Silurian period: Implications from basalt geochemistry, palaeomagnetism and faunas (Prague Basin, Tepl-Barrandian Unit, Bohemian Massif), In BRGM & SGF: Géologie de la France, v. 2012, p. 213-214.
352. Tesakov, Y.I., Predtetchenskyj, N.N., Khromych, V.G., Berger, A.Y., and Kovalevskaya, E.O., 2003, Stratigraphy and paleogeography of the Silurian of East Siberia, in Landing, E., and Johnson, M.E., eds., Silurian Lands and Shelf Margins Exclusive of North America: New York State Museum Bulletin 492, p. 345-400.
353. Thompson, C.K., and Kah, L.C., 2012, Sulfur isotope evidence for widespread euxinia and a fluctuating oxycline in Early to Middle Ordovician greenhouse oceans: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 313, p. 189-214, doi:10.1016/j.palaeo.2011.10.020.
354. Tomczyk, H., 1963, Ordowik i sylur w podlou Zapadliska Przedkarpackiego: Rocznik Polskiego Towarzystwa Geologicznego, v. 33, p. 289-320.
355. Trabucho-Alexandre, J., Hay, W.W., and de Boer, P.L., 2012, Phanerozoic environments of black shale deposition and the Wilson cycle: Solid Earth, v. 3, p. 29-42, doi: 10.5194/se-3-29-2012.
356. Trotter, J.A., Williams, I.S., Barnes, C.R., Lecuyer, C., and Nicoll, R.S., 2008, Did cooling oceans trigger Ordovician biodiversification? Evidence from conodont thermometry: Science, v. 321, p. 550-554, doi:10.1126 /science.1155814.
357. Tsandev, I., and Slomp, C.P., 2009, Modeling phosphorus cycling and carbon burial during Cretaceous oceanic anoxic events: Earth and Planetary Science Letters, v. 286, p. 71-79, doi:10.1016/j.epsl.2009.06.016.
358. Tsandev, I., Slomp, C.P., and Van Cappellen, P., 2008, Glacialinterglacial variations in marine phosphorus cycling: Implications for ocean productivity: Global Biogeochemical Cycles, v. 22, doi:10.1029/2007GB003054.
359. Tsandev, I., Rabouille, C., Slomp, C.P., and Van Cappellen, P., 2010, Shelf erosion and submarine river canyons: Implications for deep-sea oxygenation and ocean productivity during glaciation: Biogeosciences, v. 7, p. 1973-1982, doi:10.5194/bg-7-1973-2010.
360. Underwood, C.J., Crowley, S.F., Marshall, J.D., and Brenchley, P.J., 1997, High-resolution carbon isotope stratig raphy of the basal Silurian stratotype (Dob's Linn, Scotland) and its global correlation: Journal of the Geological Society of London, v. 154, p. 709-718, doi:10.1144 /gsjgs.154.4.0709.
361. Underwood, C.J., Deynoux, M., and Ghienne, J.F., 1998, High palaeolatitude (Hodh, Mauritania) recovery of graptolite faunas after the Hirnantian (end Ordovician) extinction event: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 142, p. 91-105, doi:10.1016/S0031 -0182(98)00070-4.
362. Van Cappellen, P., and Ingall, E.D., 1994, Benthic phosphorus regeneration, net primary production, and ocean anoxia: A model of the coupled marine biogeochemical cycles of carbon and phosphorus: Paleoceanography, v. 9, p. 677- 692, doi:10.1029/94PA01455.
363. Vandenberg, A.H.M., Rickards, R.B., and Holloway, D.J., 1984, The Ordovician-Silurian boundary at Darraweit Guim, central Victoria: Alcheringa, v. 8, p. 1-22, doi: 10.1080/03115518408619607.
364. Vandenbroucke, T.R.A., Armstrong, H.A., Williams, M., Paris, F., Zalasiewicz, J.A., Sabbe, K., Nolvak, J., Challands, T.J., Verniers, J., and Servais, T., 2010, Polar front shift and atmospheric CO2 during the glacial maximum of the early Paleozoic icehouse: Proceedings of the National Academy of Sciences of the United States of America, v. 107, p. 14,983-14,986, doi:10.1073 /pnas.1003220107.
365. van Staal, C.R., and Hatcher, R.D., Jr., 2010, Global setting of Ordovician orogenesis, in Finney, S.C., and Berry, W.B.N., eds., The Ordovician Earth System: Geological Society of America Special Paper 466, p. 1-11.
366. van Staal, C.R., Vujovich, G.I., Currie, K.L., and Naipauer, M., 2011, An Alpine-style Ordovician collision complex in the Sierra de Pie de Palo, Argentina: Record of subduction of Cuyania beneath the Famatina arc: Journal of Structural Geology, v. 33, p. 343-361, doi:10.1016/j.jsg.2010.10.011.
367. Vaslet, D., 1990, Upper Ordovician glacial deposits in Saudi Arabia: Episodes, v. 13, p. 147-167.
368. Vecoli, M., 2008, Fossil microphytoplankton dynamics across the Ordovician-Silurian boundary: Review of Palaeobotany and Palynology, v. 148, p. 91-107, doi:10.1016 /j.revpalbo.2006.11.004.
369. Vecoli, M., Delabroye, A., Spina, A., and Hints, O., 2011, Cryptospore assemblages from Upper Ordovician (Katian-Hirnantian) strata of Anticosti Island, Quebec, Canada, and Estonia: Palaeophytogeographic and palaeo climatic implications: Review of Palaeobotany and Palynology, v. 166, p. 76-93, doi:10.1016 /j.revpalbo.2011.05.006.
370. Videt, B., Paris, F., Rubino, J.-L., Boumendjel, K., Dabard , M.-P., Loi, A., Ghienne, J.-F., Marante, A., and Gorini, A., 2010, Biostratigraphical calibration of third order Ordovician sequences on the northern Gondwana platform: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 359-375, doi:10.1016/j.palaeo.2010 .03.050.
371. Villas, E., Vennin, E., Álvaro, J.J., Hammann, W., Herrera, Z.A., and Piovano, E.L., 2002, The Late Ordovician carbonate sedimentation as a major triggering factor of the Hirnantian glaciation: Bulletin de la Société Géologique de France, v. 173, no. 6, p. 569-578, doi: 10.2113/173.6.569.
372. Vujovich, G.I., van Staal, C.R., and Davis, W., 2004, Age constraints on the tectonic evolution and provenance of the Pie de Palo complex, Cuyania composite terrane, and the Famatinian orogeny in the Sierra de Pie de Palo, San Juan, Argentina: Gondwana Research, v. 7, p. 1041-1056, doi:10.1016/S1342-937X(05)71083-2.
373. Wang, K., Chatterton, B.D.E., Attrep, M.J., and Orth, C.J., 1992, Iridium abundance maxima at the latest Ordo vician mass extinction horizon, Yangtze Basin, China: Terrestrial or extraterrestrial?: Geology, v. 20, p. 39- 42, doi:10.1130/0091-7613(1992)020<0039:IAMATL >2.3.CO;2.
374. Wang, T., Hong, D., Jahn, B., Tong, Y., Wang, Y., Han, B., and Wang, X., 2006, Timing, petrogenesis, and setting of Paleozoic synorogenic intrusions from the Altai Mountains, Northwest China: Implications for the tectonic evolution of an accretionary orogen: The Journal of Geology, v. 114, p. 735-751, doi:10.1086/507617.
375. Wang, X., and Chai, Z., 1989, Terminal Ordovician mass extinction and discovery of iridium anomaly-An example from the Ordovician-Silurian boundary section, eastern Yangtze Gorges area, China, in Progress of Geosciences of China 1985-1988, Volume III: Beijing, Geological Publishing House, p. 11-16.
376. Webb, B.C., Rushton, A.W.A., and White, D.E., 1993, Classic Areas of British Geology: Moffatdale and the Upper Ettrick Valley: Description of the Solid Geology of Parts of Sheets NT 10, 11, 20 and 21: London, Her Majesty's Stationery Office for the British Geological Survey, scale 1:25,000.
377. Wignall, P.B., 1991, Model for transgressive black shales?: Geology, v. 19, p. 167-170.
378. Wignall, P.B., 1994, Black Shales: Oxford, UK, Oxford University Press, 127 p.
379. Wilde, P., 1987, Model of progressive ventilation of the late Precambrian-early Paleozoic ocean: American Journal of Science, v. 287, p. 442-459, doi:10.2475 /ajs.287.5.442.
380. Wilde, P., 1991, Oceanography in the Ordovician, in Barnes, C.R., and Williams, S.H., eds., Advances in Ordovician Geology: Geological Survey of Canada Paper 90-9, p. 283-298.
381. Wilde, P., and Berry, W.B.N., 1984, Destabilization of the oceanic density structure and its significance to marine "extinction" events: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 48, p. 143-162, doi:10.1016 /0031-0182(84)90041-5.
382. Wilde, P., Berry, W.B.N., Quinby-Hunt, M.S., Orth, C.J., Quintana, L.R., and Gilmore, J.S., 1986, Iridium abundances across the Ordovician-Silurian stratotype: Science, v. 233, p. 339-341, doi:10.1126/science.233 .4761.339.
383. Wilde, P., Lyons, T.W., and Quinby-Hunt, M.S., 2004, Organic carbon proxies in black shales: Molybdenum: Chemical Geology, v. 206, p. 167-176, doi:10.1016 /j.chemgeo.2003.12.005.
384. Williams, G.E., 1991, Milankovitch-band cyclicity in bedded halite deposits contemporaneous with Late Ordovician- Early Silurian glaciation, Canning Basin, Western Australia: Earth and Planetary Science Letters, v. 103, p. 143-155, doi:10.1016/0012-821X(91)90156-C.
385. Williams, S.H., 1982, The Late Ordovician graptolite fauna of the Anceps Bands at Dob's Linn, southern Scotland: Geologica et Palaeontologica, v. 16, p. 29-56.
386. Williams, S.H., 1983, The Ordovician-Silurian boundary graptolite fauna of Dob's Linn, southern Scotland: Palaeon tology, v. 26, p. 605-639.
387. Williams, S.H., and Barnes, C.R., eds., 1988, Program and Abstracts: Fifth International Symposium on the Ordovician System, August 9-12, 1988: Memorial University, St. John's, Newfoundland, 117 p.
388. Witzke, B.J., 1987, Models for circulation patterns in epicontinental seas applied to Paleozoic facies of North America craton: Paleoceanography, v. 2, p. 229-248, doi:10.1029/PA002i002p00229.
389. Yan, D.T., Chen, D.Z., Wang, Q.C., Wang, J.G., and Wang, Z.Z., 2009, Carbon and sulfur isotopic anomalies across the Ordovician-Silurian boundary on the Yangtze platform, South China: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 274, p. 32-39, doi:10.1016 /j.palaeo.2008.12.016.
390. Yan, D.T., Chen, D.Z., Wang, Q.C., and Wang, J.G., 2012, Predominance of stratified anoxic Yangtze Sea interrupted by short-term oxygenation during the Ordo-Silurian transition: Chemical Geology, v. 291, p. 69-78, doi:10.1016/j.chemgeo.2011.09.015.
391. Yapp, C.J., and Poths, H., 1992, Ancient atmospheric CO2 pressures inferred from natural goethites: Nature, v. 355, p. 342-344, doi:10.1038/355342a0.
392. Young, G.A., Minter, W.E.L., and Theron, J.N., 2004, Geochemistry and palaeogeography of Upper Ordovician glaciogenic sedimentary rocks in the Table Mountain Group, South Africa: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 214, p. 323-345.
393. Young, S.A., Saltzman, M.R., Bergström, S.M., Leslie, S.A., and Chen, X., 2008, Paired 13Ccarb and 13Corg records of Upper Ordovician (Sandbian-Katian) carbonates in North America and China: Implications for paleoceanographic change: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 270, p. 166-178, doi:10.1016 /j.palaeo.2008.09.006.
394. Young, S.A., Saltzman, M.R., Foland, K.A., Linder, J.S., and Kump, L.R., 2009, A major drop in seawater Sr-87/Sr-86 during the Middle Ordovician (Darriwilian): Links to volcanism and climate?: Geology, v. 37, p. 951-954.
395. Young, S.A., Saltzman, M.R., Ausich, W.I., Desrochers, A., and Kaljo, D., 2010, Did changes in atmospheric CO2 coincide with latest Ordovician glacial-interglacial cycles?: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 296, p. 376-388, doi:10.1016/j.palaeo.2010 .02.033.
396. Zalasiewicz, J., Williams, M., Miller, M., Page, A., and Blackett, E., 2007, Early Silurian (Llandovery) graptolites from central Saudi Arabia: First documented record of Telychian faunas from the Arabian Peninsula: GeoArabia, v. 12, p. 15-36.
397. Zhan, R.B., and Jin, J., 2007, Ordovician-Early Silurian (Llandovery) Stratigraphy and Palaeontology of the Upper Yangtze Platform, South China: Beijing, Science Press, 169 p.
398. Zhang, S.X., and Barnes, C.R., 2002, A New Llandovery (Early Silurian) Conodont Biozonation and Conodonts from the Bescie, Merrimack, and Gun River Formations, Anticosti Island, Quebec: Paleontological Society Memoir 57 (Journal of Paleontology, v. 76, supplement), 46 p.
399. Zhang, S.X., and Barnes, C.R., 2007, Late Ordovician to Early Silurian conodont faunas from the Kolyma terrane, Omulev Mountains, northeast Russia, and their paleobiogeographic affinity: Journal of Paleontology, v. 81, p. 490-512, doi:10.1666/05077.1.
400. Zhang, T., Shen, Y., Zhan, R., Shen, S., and Chen, X., 2009, Large perturbations of the carbon and sulfur cycle asso ciated with the Late Ordovician mass extinction in South China: Geology, v. 37, p. 299-302, doi:10.1130 /G25477A.1.
401. Zhang, T.G., Trela, W., Jiang, S.Y., Nielsen, J.K., and Shen, Y.N., 2011, Major oceanic redox condition change correlated with the rebound of marine animal diversity during the Late Ordovician: Geology, v. 39, p. 675- 678, doi:10.1130/G32020.1.
402. Zhang, Y.D., Chen, X., Yu, G.H., Goldman, D., and Liu, X., 2007, Ordovician and Silurian Rocks of Northwest Zhejiang and Northeast Jiangxi Provinces, SE China: Hefei, University of Science and Technology of China Press, 189 p.
403. Zhou, L., Su, J., Huang, J.H., Yan, J.X., Xie, X.N., Gao, S., Dai, M.N., and Tonger, 2011, A new paleoenvironmental index for anoxic events-Mo isotopes in black shales from Upper Yangtze marine sediments: Science China-Earth Sciences, v. 54, no. 7, p. 1024-1033, doi:10.1007/s11430-011-4188-z.
404. Zhou, L., Wignall, P., Su, J., Feng, Q., Xie, S., Zhao, L., and Huang, J., 2012, U/Mo ratios and ä98/95Mo as local and global redox proxies during mass extinction events: Chemical Geology, v. 324-325, p. 99107.
405. Žigaite, Z., Joachimski, M.M., Lehnert, O., and Brazauskas, A., 2010, d18O composition of conodont apatite indicates climatic cooling during the middle Pridoli: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 294, p. 242-247, doi:10.1016/j.palaeo.2010.03.033.