Portrait of a late Paleocene (Early Clarkforkian) terrestrial ecosystem: Big Multi Quarry and associated strata, Washakie Basin, Southwestern Wyoming

Palaios

Volumn 13, Issue 6, 1998, Pages 514-532

  Wilf, Peter ^a   Beard, K Christopher ^b   Davies Vollum, K Siân ^c   Norejko, Jay W ^d  

^a DEPARTMENT OF PALEOBIOLOGY   (United States)

^b SECTION OF VERTEBRATE PALEONTOLOGY   (United States)

^c BALL STATE UNIVERSITY   (United States)

^d STONY BROOK UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

PALEOCENE; PALEOECOLOGY; TERRESTRIAL ECOSYSTEM;

UNITED STATES;

EID: 0032446256     PISSN: 08831351     EISSN: None     Source Type: Journal    
DOI: 10.1043/0883-1351(1998)013<0514:POALPE>2.0.CO;2     Document Type: Article

References (108)

1. ALROY, J., 1996, Constant extinction, constrained diversification, and uncoordinated stasis in North American mammals: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 127,p. 285-311.
2. ARCHIBALD, J.D., CLEMENS, W.A., GINGERICH, P.D., KRAUSE, D.W.,LINDSAY, E.H., and ROSE, K.D., 1987, First North American land mammal ages of the Cenozoic Era: in Woodburne, M.O., ed., Cenozoic Mammals of North America: Geochronology and Biostratigraphy: University of California Press, Berkeley, p. 24-76.
3. ARKLEY, R.J., 1963, Calculation of carbonate and water movement in soil from climatic data: Soil Science, v. 96, p. 239-248.
4. ATKINSON, C.D., 1986, Tectonic control on alluvial sedimentation as revealed by an ancient catena in the Capella Formation (Eocene) of northern Spain: in Wright, V.P., ed., Paleosols: Their recognition and interpretation, Princeton University Press, Princeton, p. 139-179.
5. BARTELS, W.S., 1983, A transitional Paleocene-Eocene reptile fauna from the Bighorn Basin, Wyoming: Herpetologica, v. 39, p. 359-374.
6. BEARD, K.C., 1990, Gliding behaviour and palaeoecology of the alleged primate family Paromomyidae (Mammalia, Dermoptera): Nature, v. 345, p. 340-341.
7. BEARD, K.C., 1991, Vertical postures and climbing in the morphotype of Primatomorpha: Implications for locomotor evolution in primate history: in Coppens, Y., and Senut, B., eds., Origines de la Bipédie chez les Hominidés: éditions du CNRS (Cahiers de Paléoanthropologie), Paris, p. 79-87.
8. BEARD, K.C., 1993a, Phylogenetic systematics of the Primatomorpha, with special reference to Dermoptera: in Szalay, F.S., Novacek, M.J., and McKenna, M.C., eds., Mammal Phylogeny: Placentals: Springer-Verlag, New York, p. 129-150.
9. BEARD, K.C., 1993b, Origin and evolution of gliding in early Cenozoic Dermoptera (Mammalia, Primatomorpha): in MacPhee, R.D.E., ed., Primates and their relatives in phylogenetic perspective: Plenum Press, New York, p. 63-90.
10. BEARD, K.C., 1998, East of Eden: Asia as an important center of taxonomic origination in mammalian evolution: in Beard, K.C., and Dawson, M.R., eds., Dawn of the Age of Mammals in Asia: Bulletin of Carnegie Museum of Natural History No. 34, p. 5-39.
11. BECK, A.L., and LABANDEIRA, C.C., 1998, Early Permian insect folivory on a gigantopterid-dominated riparian flora from north-central Texas: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 142, p. 139-173.
12. BERGGREN, W.A., KENT, D.V., SWISHER, C.C., III, and AUBRY, M.-P., 1995, A revised Cenozoic geochronology and chronostratigraphy: in Berggren, W.A., Kent, D.V., Aubry, M.-P., and Hardenbol, J., eds., Geochronology, Time Scales and Global Stratigraphic Correlation: Society for Sedimentary Geology, Special Publication No. 54, Tulsa, p. 129-212.
13. th International Working Meeting of Soil Micromorphology, San Antonio, p. 257-278.
14. BOWN, T.M., and KRAUS, M.J., 1981, Lower Eocene alluvial paleosols (Willwood Formation, northwest Wyoming, U.S.A.) and their significance for paleoecology, paleoclimatology, and basin analysis: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 34, p. 1-30.
15. BOWN, T.M., ROSE, K.D., SIMONS, E.L., and WING, S.L., 1994, Distribution and stratigraphic correlation of upper Paleocene and lower Eocene fossil mammal and plant localities of the Fort Union, Willwood, and Tatman Formations, southern Bighorn Basin, Wyoming: U.S. Geological Survey Professional Paper No. 1540, 103 p.
16. BROWN, R.W., 1962, Paleocene flora of the Rocky Mountains and Great Plains: U.S. Geological Survey Professional Paper No. 375, 119 p.
17. BURNHAM, R.J., 1996, Diversity of tropical forest leaf litter from Pakitza, Perú: in Wilson, D.E., and Sandoval, A., eds., Manu: Smithsonian Institution, Washington, p. 127-140.
18. BURNHAM, R.J., 1997, Stand characteristics and leaf litter composition of a dry forest hectare in Santa Rosa National Park, Costa Rica: Biotropica, v. 29, p. 384-395.
19. BURNHAM, R.J., WING, S.L., and PARKER, G.G., 1992, The reflection of deciduous forest communities in leaf litter: Implications for autochthonous litter assemblages from the fossil record: Paleobiology, v. 18, p. 30-49.
20. BUTLER, R.F., GINGERICH, P.D., and LINDSAY, E.H., 1981, Magnetic polarity stratigraphy and biostratigraphy of Paleocene and lower Eocene continental deposits, Clark's Fork Basin, Wyoming: Journal of Geology, v. 89, p. 299-316.
21. CHAGUE-GOFF, C., GOODARZI, F. and FYFE, W.S., 1996, Elemental distribution and pyrite occurrence in a freshwater peatland, Alberta: Journal of Geology, v. 104, p. 649-663.
22. CORFIELD, R.M., and CARTLIDGE, J.E., 1992, Oceanographic and climatic implications of the Palaeocene carbon isotope maximum: Terra Nova, v. 4, p. 443-455.
23. CRANE, P.R., MANCHESTER, S.R., and DILCHER, D.L., 1990, A preliminary survey of fossil leaves and well-preserved reproductive structures from the Sentinel Butte Formation (Paleocene) near Almont, North Dakota: Fieldiana Geology New Series No. 20, 63 p.
24. DASHZEVEG, D., 1990, New trends in adaptive radiation of early Tertiary rodents (Rodentia, Mammalia): Acta Zoologica Cracoviensia, v. 33, p. 37-44.
25. DAVIES-VOLLUM, K.S., 1996, Underbeds beneath early Tertiary carbonaceous shales of the Bighorn Basin, Wyoming: Geological Society of America Annual Meeting, Abstracts with Programs, v. 28, p. 208.
26. DAVIES-VOLLUM, K.S., and WING, S.L., 1998, Sedimentological, taphonomic, and climatic aspects of Eocene swamp deposits (Willwood Formation, Bighorn Basin, Wyoming): PALAIOS, v. 13, p. 26-38.
27. DAWSON, M.R., and BEARD, K.C., 1996, New late Paleocene rodents (Mammalia) from Big Multi Quarry, Washakie Basin, Wyoming: Palaeovertebrata, v. 25, p. 301-321.
28. DOUGHTY, S.C., GILL, D.J., and BLOUIN, D.C., 1994, A systematic survey of freeze-damaged palms in the New Orleans area after the 1989 freeze of the century: Principes, v. 38, p.64-72.
29. GAZIN, C.L., 1962, A further study of the lower Eocene mammalian faunas of southwestern Wyoming: Smithsonian Miscellaneous Collections, v. 144, p. 1-98.
30. GEMMILL, C.E.C., and JOHNSON, K.R., 1997, Paleoecology of a late Paleocene (Tiffanian) megaflora from the northern Great Divide Basin: PALAIOS, v. 12, p. 439-448.
31. GINGERICH, P.D., 1989, New earliest Wasatchian mammalian fauna from the Eocene of northwestern Wyoming: Composition and diversity in a rarely sampled high-floodplain assemblage: University of Michigan Papers on Paleontology No. 28, 97 p.
32. GINGERICH, P.D., ROSE, K.D., and KRAUSE, D.W., 1980, Early Cenozoic mammalian faunas of the Clark's Fork Basin-Polecat Bench area, northwestern Wyoming: in Gingerich, P.D., ed., Early Cenozoic paleontology and stratigraphy of the Bighorn Basin, Wyoming: University of Michigan Papers on Paleontology No. 24, p. 51-68.
33. GIVNISH, T.J., 1984, Leaf and canopy adaptations in tropical forests: in Medina, E., Mooney, H.A., and Vaźquez-Yánes, C., eds., Physiological ecology of plants of the wet tropics: Junk, The Hague, p. 51-84.
34. GREENWOOD, D.R., 1992, Taphonomic constraints on foliar physiognomic interpretations of Late Cretaceous and Tertiary paleoclimates: Review of Palaeobotany and Palynology, v. 71, p. 149-190.
35. GREENWOOD, D.R., and WING, S.L., 1995, Eocene continental climates and latitudinal temperature gradients: Geology, v. 23, p. 1044-1048.
36. GREGORY, K.M., and MCINTOSH, W.C., 1996, Paleoclimate and paleoelevation of the Oligocene Pitch-Pinnacle flora, Sawatch Range, Colorado: Geological Society of America Bulletin, v. 108, p. 545-561.
37. GUNNELL, G.F., 1994, Paleocene mammals and faunal analysis of the Chappo type locality (Tiffanian), Green River Basin, Wyoming: Journal of Vertebrate Paleontology, v. 14, p. 81-104.
38. GUNNELL, G.F., 1997, Wasatchian-Bridgerian (Eocene) paleoecology of the western interior of North America: Changing paleoenvironments and taxonomic composition of omomyid (Tarsiiformes) primates: Journal of Human Evolution, v. 32, p. 105-132.
39. GUNNELL, G.F., and BARTELS, W.S., 1994, Early Bridgerian (middle Eocene) vertebrate paleontology and paleoecology of the southern Green River Basin, Wyoming: Contributions to Geology, University of Wyoming, v. 30, p. 57-70.
40. GUNNELL, G.F., and GINGERICH, P.D., 1993, Skeleton of Brachianodon westorum, a new middle Eocene metacheiromyid (Mammalia,Palaeanodonta) from the early Bridgerian (Bridger A) of the southern Green River Basin, Wyoming: Contributions from the Museum of Paleontology, University of Michigan, v. 28, p. 365-392.
41. HAYDEN, F.V., 1871, Preliminary report of the United States Geological Survey of Wyoming: Government Printing Office, Washington, 511 p.
42. HERMAN, A.B., and SPICER, R.A., 1997, New quantitative paleoclimate data for the Late Cretaceous Arctic: Evidence for a warm polar ocean: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 128, p. 227-251.
43. HETTINGER, R.D., and KIRSCHBAUM, M.A., 1991, Chart showing correlations of some Upper Cretaceous and lower Tertiary rocks, from the east flank of the Washakie Basin to the east flank of the Rock Springs Uplift, Wyoming: U.S. Geological Survey, Miscellaneous Investigations Map I-2152.
44. HEYWOOD, V.H., 1993, Flowering plants of the world: Oxford University Press, New York, 336 p.
45. HICKEY, L.J., 1973, Classification of the architecture of dicotyledonous leaves: American Journal of Botany, v. 60, p. 17-33.
46. HICKEY, L.J., 1977, Stratigraphy and paleobotany of the Golden Valley Formation (Early Tertiary) of western North Dakota: Geological Society of America Memoir No. 150, 183 p.
47. nd ed.: Clarendon, Oxford, p. 25-39.
48. HICKEY, L.J., 1980, Paleocene stratigraphy and flora of the Clark's Fork Basin: in Gingerich, P.D., ed., Early Cenozoic paleontology and stratigraphy of the Bighorn Basin, Wyoming: University of Michigan Papers on Paleontology No. 24, p. 33-49.
49. HICKEY, L.J., and WOLFE, J.A., 1975, The bases of angiosperm phylogeny: Vegetative morphology: Annals of the Missouri Botanical Garden, v. 62, p. 538-589.
50. JOHNSON, K.R., 1996, Description of seven common fossil leaf species from the Hell Creek Formation (Upper Cretaceous: Upper Maastrichtian), North Dakota, South Dakota, and Montana: Proceedings of the Denver Museum of Natural History, Series 3, No. 12, 47 p.
51. KENNETT, J.P., and STOTT, L.D., 1991, Abrupt deep-sea warming, palaeoceanographic changes and benthic extinctions at the end of the Palaeocene: Nature, v. 353, p. 225-229.
52. KIRSCHBAUM, M.A., 1987, Stratigraphic and sedimentologic framework of Paleocene rocks, southwest flank of the Rock Springs Uplift, Sweetwater County, Wyoming: U.S. Geological Survey Map MF-1973.
53. KIRSCHBAUM M.A., ANDERSON, D.W., HELM, R.L., and BALDWIN, R.J., 1994, Paleocene drainage systems, Rock Springs uplift, Wyoming: The Mountain Geologist, v. 31, p. 19-28.
54. KIRSCHBAUM, M.A., and NELSON, S.N., 1988, Geologic history and palynologic dating of Paleocene deposits, western Rock Springs uplift, Sweetwater County, Wyoming: Contributions to Geology, University of Wyoming, v. 26, p. 21-28.
55. KNIGHT, D.H., 1994, Mountains and plains: The ecology of Wyoming landscapes: Yale University Press, New Haven, 338 p.
56. KOCH, P.L., ZACHOS, J.C., and GINGERICH, P.D., 1992, Correlation between isotope records in marine and continental carbon reservoirs near the Palaeocene/Eocene boundary. Nature, v. 358, p. 319-322.
57. KOENIGSWALD, W. VON, 1980, Das Skelett eines Pantolestiden (Proteutheria, Mamm.) aus dem mittleren Eozän von Messel bei Darmstadt: Paläontologische Zeitschrift, v. 54, p. 267-287.
58. KOENIGSWALD, W. von, and SCHIERNING, H.-P., 1987, The ecological niche of an extinct group of mammals, the early Tertiary apatemyids: Nature, v. 326, p. 595-597.
59. KRAUS, M.J., and ASLAN, A., 1993, Eocene hydromorphic paleosols: Significance for interpreting ancient floodplain processes: Journal of Sedimentary Petrology, v. 63, p. 453-463.
60. KRAUSE, D.W., 1986, Competitive exclusion and taxonomic displacement in the fossil record: The case of rodents and multituberculates in North America: in Flanagan, K.M., and Lillegraven, J.A., eds., Vertebrates, phylogeny, and philosophy: Contributions to Geology, University of Wyoming, Special Paper No. 3, p. 95-117.
61. LEBKUECHER, J.G., 1997, Desiccation-time limits of photosyntheticrecovery in Equisetum hyemale (Equisetaceae) spores: American Journal of Botany, v. 84, p. 792-797.
62. LEGENDRE, S., 1989, Les communautés de mammifères du Paléogène (Eocène supérieur et Oligocène) d'Europe occidentale: Structures, milieux et évolution: Münchner Geowissenschaftliche Abhandlungen, Reihe A, Geologie und Paläontologie, v. 16, p. 1-110.
63. LOVE, J.D., and CHRISTIANSEN, A.C., 1985, Geologic map of Wyoming: U.S. Geological Survey, scale 1:500,000.
64. MANCHESTER, S.R., and CHEN, Z., 1996, Palaeocarpinus aspinosa sp. nov. (Betulaceae) from the Paleocene of Wyoming, U.S.A.: International Journal of Plant Sciences, v. 157, p. 644-655.
65. MANCHESTER, S.R., and DILCHER, D.L., 1997, Reproductive and vegetative morphology of Polyptera (Juglandaceae) from the Paleocene of Wyoming and Montana: American Journal of Botany, v. 84, p. 649-663.
66. MARKWICK, P.J., 1994, "Equability," continentality, and Tertiary "climate:" The crocodilian perspective: Geology, v. 22, p. 613-616.
67. MATTHEW, W.D., 1909, The Carnivora and Insectivora of the Bridger Basin, middle Eocene: Memoirs of the American Museum of Natural History, v. 9, p. 289-567.
68. MENG, J., WYSS, A.R., DAWSON, M.R., and ZHAI, R., 1994, Primitive fossil rodent from Inner Mongolia and its implications for mammalian phylogeny: Nature, v. 370, p. 134-136.
69. PFRETZSCHNER, H.-U., 1993, Muscle reconstruction and aquatic locomotion in the middle Eocene Buxolestes piscator from Messel near Darmstadt: Kaupia, v. 3, p. 75-87.
70. PIGG, K.B., STOCKEY, R.A., and MAXWELL, S.L., 1993, Pakomyrtinaea, a new genus of permineralized myrtaceous fruits and seeds from the Eocene of British Columbia and Paleocene of North Dakota: Canadian Journal of Botany, v. 71, p. 1-9.
71. RETALLACK, G.J., 1991, Untangling the effects of burial alteration and ancient soil formation: Annual Review of Earth and Planetary Sciences, v. 19, p. 183-206.
72. ROEHLER, H.W., 1973, Geologic map of the Potter Mountain Quadrangle, Sweetwater County, Wyoming: U.S. Geological Survey Map GQ-1082.
73. ROEHLER, H.W., 1979, Geology and energy resources of the Sand Butte Rim NW Quadrangle, Sweetwater County, Wyoming: U.S. Geological Survey Professional Paper No. 1065-A, 54 p.
74. ROEHLER, H.W., 1992, Introduction to greater Green River Basin geology, physiography, and history of investigations: U.S. Geological Survey Professional Paper No. 1506-A, 14 p.
75. ROSE, K.D., 1980, Clarkforkian Land-Mammal Age: Revised definition, zonation, and tentative intercontinental correlations: Science, v. 208, p. 744-746.
76. ROSE, K.D., 1981a, The Clarkforkian Land-Mammal Age and mammalian faunal composition across the Paleocene-Eocene boundary: University of Michigan Papers on Paleontology No. 26, 197 p.
77. ROSÉ, K.D., 1981b, Composition and species diversity in Paleocene and Eocene mammal assemblages: An empirical study: Journal of Vertebrate Paleontology, v. 1, p. 367-388.
78. ROSE, K.D., 1987, Climbing adaptations in the early Eocene mammal Chriacus and the origin of Artiodactyla: Science, v. 236, p. 314-316.
79. SAKAI, A., and LARCHER, W., 1987, Frost survival of plants: Responses and adaptation to freezing stress: Springer-Verlag, Berlin, 321 p.
80. SAVAGE, D.E., and WATERS, B.T., 1978, A new omomyid primate from the Wasatch Formation of southern Wyoming: Folia Primatologica, v. 30, p. 1-29.
81. SAVAGE, D.E., WATERS, B.T., and HUTCHISON, J.H., 1972, Northwestern border of the Washakie Basin, Wyoming: in West, R.M., ed., Guidebook: Field conference on Tertiary biostratigraphy of southern and western Wyoming: Adelphi University, Garden City, p. 32-39.
82. SAVIN, S.M., 1977, The history of the Earth's surface temperature during the past 100 million years: Annual Review of Earth and Planetary Sciences, v. 5, p. 319-355.
83. SLOAN, L.C., 1994, Equable climates during the early Eocene: Significance of regional paleogeography for North American climate: Geology, v. 22, p. 881-884.
84. SMITH, A.G., SMITH, D.G., and FUNNELL, B.M., 1994, Atlas of Mesozoic and Cenozoic coastlines: Cambridge University Press, Cambridge, 99 p.
85. SOBECKI, T.M., and WILDING, L.P., 1982: Calcic horizon distribution and soil classification in selected soils of the Texas coast prairie: Soil Science Society of America Journal, v. 46, p. 1222-1227.
86. SZALAY, F.S., 1985, Rodent and lagomorph morphotype adaptations, origins, and relationships: Some postcranial attributes analyzed: in Luckett, W.P., and Hartenberger, J.-L., eds., Evolutionary relationships among rodents: A multidisciplinary analysis: Plenum Press, New York, p. 83-132.
87. SZALAY, F.S., 1994, Evolutionary history of the marsupials and an analysis of osteological characters: Cambridge University Press, Cambridge, 481 p.
88. THOMAS, E., and SHACKLETON, N.J., 1996, The latest Paleocene benthic foraminiferal extinction and stable isotope anomalies: in Knox, R.O., Corfield, R.M., and Dunay, R.E., eds., Correlation of the early Paleogene in Northwest Europe: (London) Geological Society Special Publication No. 101, p. 401-441.
89. TONG, Y., and DAWSON, M.R., 1995, Early Eocene rodents (Mammalia) from Shandong Province, People's Republic of China: Annals of Carnegie Museum, v. 64, p. 51-63.
90. WEBB, L.J., 1959, A physiognomic classification of Australian rain forests: Journal of Ecology, v. 47, p. 551-570.
91. WILDE, S.A., COREY, R.B., IYER, J.G., and VOIGHT, O.K., 1979, Soil and plant analysis for tree culture: Oxford and IBH Publishing Co., New Delhi, 224 p.
92. WILDING, L.P., and REHAGE, J.A., 1985, Pedogenesis of soils with aquic moisture regimes: Wetland soils, classification and utilization: The Institute, Los Banos, Philippines, p. 139-157.
93. WILF, P., 1997, When are leaves good thermometers? A new case for Leaf Margin Analysis: Paleobiology, v. 23, p. 373-390.
94. WILF, P., WING, S.L., GREENWOOD, D.R., and GREENWOOD, C.L., 1998, Using fossil leaves as paleoprecipitation indicators: An Eocene example: Geology, v. 26, p. 203-206.
95. WILLIAMS, B.A., and COVERT, H.H., 1994, New early Eocene anaptomorphine primate (Omomyidae) from the Washakie Basin, Wyoming, with comments on the phylogeny and paleobiology of anaptomorphines: American Journal of Physical Anthropology, v. 93, p. 323-340.
96. WING, S.L., 1998, Late Paleocene-early Eocene floral and climatic change in the Bighorn Basin, Wyoming: in Berggren, W.A., Aubry, M.-P., and Lucas, S., eds., Late Paleocene-early Eocene biotic and climatic events: Columbia University Press, New York, p. 371-391.
97. WING, S.L., ALROY, J., and HICKEY, L.J., 1995, Plant and mammal diversity in the Paleocene to early Eocene of the Bighorn Basin: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 115, p. 117-155.
98. WING, S.L., BAO, H., and KOCH, P.L., in press, An early Eocene cool period? Evidence for continental cooling during the warmest part of the Cenozoic: in Huber, B.T., MacLeod, K., and Wing, S.L., eds., Warm climates in Earth history: Cambridge University Press, Cambridge.
99. WING, S.L., and DIMICHELE, W.A., 1995, Conflict between local and global changes in plant diversity through geological time: PALAIOS, v. 10, p. 551-564.
100. WING, S.L., and FLEMING, F., 1995, Why no adaptive radiation of plants in the Paleocene?: Geological Society of America Annual Meeting, Abstracts with Programs, v. 27, p. 164.
101. WING, S.L., and GREENWOOD, D.R., 1993, Fossils and fossil climate: The case for equable continental interiors in the Eocene: Philosophical Transactions of the Royal Society of London B, v. 341, p. 243-252.
102. WING, S.L., and SUES, H.-D., 1992, Mesozoic and early Cenozoic continental ecosystems: in Behrensmeyer, A.K., Damuth, J.D., DiMichele, W.A., Potts, R., Sues, H.-D., and Wing, S.L., eds., Terrestrial ecosystems through time: University of Chicago Press, Chicago, p. 327-416.
103. WINKLER, D.A., 1983, Paleoecology of an early Eocene mammalian fauna from paleosols in the Clarks Fork Basin, northwestern Wyoming (U.S.A.): Palaeogeography, Palaeoclimatology, Palaeoecology, v. 43, p. 261-298.
104. WINTERFELD, G.F., 1982, Mammalian paleontology of the Fort Union Formation (Paleocene), eastern Rock Springs Uplift, Sweetwater County, Wyoming: Contributions to Geology, University of Wyoming, v. 21, p. 73-112.
105. WOLFE, J.A., 1979, Temperature parameters of humid to mesic forests of eastern Asia and relation to forests of other regions in the Northern Hemisphere and Australasia: U.S. Geological Survey Professional Paper No. 1106, 37 p.
106. WOLFE, J.A., 1980, Tertiary climates and floristic relationships at high latitudes in the Northern Hemisphere: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 30, p. 313-323.
107. WOLFE, J.A., 1993, A method of obtaining climatic parameters from leaf assemblages: U.S. Geological Survey Bulletin No. 2040, 71 p.
108. ZACHOS, J.C., STOTT, L.D., and LOHMANN, K.C., 1994, Evolution of early Cenozoic marine temperatures: Paleoceanography, v. 9, p. 353-387.