High-resolution U-Pb ages from the Upper Triassic Chinle Formation (New Mexico, USA) support a diachronous rise of dinosaurs

Earth and Planetary Science Letters

Volumn 309, Issue 3-4, 2011, Pages 258-267

  Irmis, Randall B ^a   Mundil, Roland ^b   Martz, Jeffrey W ^c   Parker, William G ^c,d  

^a UNIVERSITY OF UTAH   (United States)

^b BERKELEY GEOCHRONOLOGY CENTER   (United States)

^c NATIONAL PARK SERVICE   (United States)

^d UNIVERSITY OF TEXAS AT AUSTIN   (United States)

Author keywords

Biostratigraphy; Colorado Plateau; Dinosauria; Geochronology; Ischigualasto Formation; Triassic timescale

Indexed keywords

AGE CONSTRAINTS; ARGENTINA; COLORADO PLATEAU; DINOSAUR FOSSILS; DINOSAURIA; FOSSIL RECORDS; GLOBAL CORRELATION; HIGH RESOLUTION; ISCHIGUALASTO FORMATION; LATE TRIASSIC; MESOZOIC; NEW AGE; NEW CORRELATIONS; NEW MEXICO; PALYNOMORPHS; SOUTH AMERICA; TERRESTRIAL ECOSYSTEMS; TIME-SCALES; TRIASSIC; U-PB AGES; U-PB ZIRCON; UPPER TRIASSIC; VERTEBRATE FOSSILS; WEIGHTED MEAN; ZIRCON U-PB AGE;

BIOSTRATIGRAPHY; DEPOSITS; LEAD; LEAD DEPOSITS; SINGLE CRYSTALS; ZIRCON; ZIRCON DEPOSITS;

GEOCHRONOLOGY;

AGE DETERMINATION; BIOSTRATIGRAPHY; BIOTIC FACTOR; DINOSAUR; FOSSIL ASSEMBLAGE; FOSSIL RECORD; GEOCHRONOLOGY; PALEOENVIRONMENT; STRATIGRAPHIC CORRELATION; TIMESCALE; TRIASSIC; URANIUM-LEAD DATING;

COLORADO PLATEAU; NEW MEXICO; UNITED STATES;

DINOSAURIA; DINOSAUROMORPHA; VERTEBRATA;

EID: 81155160941     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2011.07.015     Document Type: Article

References (109)

1. Allen V.T. Triassic bentonite of the Painted Desert. Am. J. Sci. Fifth Ser. 1930, 19:283-288.
2. Geology, paleontology, and paleoecology of a Late Triassic lake, western New Mexico 1978, 1-95. Brigham Young University Geology Studies. S.R. Ash (Ed.).
3. Ash S.R. Upper Triassic floral zones of North America. Biostratigraphy of Fossil Plants 1980, 153-170. Dowden, Hutchinson & Ross, Inc., Stroudsburg. D.L. Dilcher, T.M. Taylor (Eds.).
4. Ash S.R. The Black Forest Bed, a distinctive unit in the Upper Triassic Chinle Formation, northeastern Arizona. J. Arizona-Nevada Acad. Sci. 1992, 24-25:59-73.
5. Ash S.R. Synopsis of the Upper Triassic flora of Petrified Forest National Park and vicinity. Mesa Southwest Mus. Bull. 2005, 9:53-61.
6. Benton M.J. The Late Triassic tetrapod extinction events. The Beginning of the Age of Dinosaurs: Faunal Changes Across the Triassic-Jurassic Boundary 1986, 303-320. Cambridge University Press, Cambridge. K. Padian (Ed.).
7. Benton M.J. More than one event in the Late Triassic mass extinction. Nature 1986, 321:857-861.
8. Benton M.J. Late Triassic to Middle Jurassic extinctions among continental tetrapods: testing the pattern. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods 1994, 366-397. Cambridge University Press, Cambridge. N.C. Fraser, H.-D. Sues (Eds.).
9. Berner R.A. GEOCARBSULF: a combined model for Phanerozoic atmospheric O2 and CO2. Geochim. Cosmochim. Acta 2006, 70:5653-5664.
10. Blakey R.C., Gubitosa R. Late Triassic paleogeography and depositional history of the Chinle Formation, southern Utah and northern Arizona. Mesozoic Paleogeography of West-Central United States 1983, 57-76. Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Denver, CO. M.W. Reynolds, E.D. Dolly (Eds.).
11. Brusatte S.L., Nesbitt S.J., Irmis R.B., Butler R.J., Benton M.J., Norell M.A. The origin and early radiation of dinosaurs. Earth Sci. Rev. 2010, 101:68-100.
12. Cadigan R.A. Tuffaceous sandstones in the Triassic Chinle Formation, Colorado Plateau. U.S. Geological Survey Professional Paper 475-B 1963, 48-51.
13. Colbert E.H. The Triassic dinosaur Coelophysis. Mus. North. Ariz. Bull. 1989, 57:1-160.
14. Cooley M.E. The Mesa Redondo Member of the Chinle Formation, Apache and Navajo counties, Arizona. Plateau 1958, 31:7-15.
15. Cornet B. Applications and limitations of palynology in age, climatic, and paleoenvironmental analyzes of Triassic sequences in North America. New Mexico Mus. Nat. Hist. Sci. Bull. 1993, 3:75-93.
16. Dickinson W.R., Gehrels G.E. U-Pb ages of detrital zircons in relation to paleogeography: Triassic paleodrainage networks and sediment dispersal across southwest Laurentia. J. Sediment. Res. 2008, 78:745-764.
17. Dickinson W.R., Gehrels G.E. Use of U-Pb ages of detrital zircons to infer maximum depositional ages of strata: a test against a Colorado Plateau Mesozoic database. Earth Planet. Sci. Lett. 2009, 288:115-125.
18. Dubiel R.F. Depositional environments of the Upper Triassic Chinle Formation in the eastern San Juan Basin and vicinity, New Mexico. U.S. Geol. Surv. Bull. 1989, 1808-B:1-22.
19. Dubiel R.F. Triassic deposystems, paleogeography, and paleoclimate of the Western Interior. Mesozoic Systems of the Rocky Mountain Region, USA 1994, 133-168. Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Denver. M.V. Caputo, J.A. Peterson, K.J. Franczyk (Eds.).
20. Dubiel, R.F., Hasiotis, S.T., in press. Facies complexity and climatic variability in a continental-scale system: the Upper Triassic Chinle Formation, Colorado Plateau, U.S.A. SEPM Special Publication.
21. Dubiel R.F., Parrish J.T., Parrish J.M., Good S.C. The Pangaean megamonsoon - evidence from the Upper Triassic Chinle Formation, Colorado Plateau. Palaios 1991, 6:347-370.
22. Furin S., Preto N., Rigo M., Roghi G., Gianolla P., Crowley J.L., Bowring S.A. High-precision U/Pb zircon age from the Triassic of Italy: implications for the Triassic time scale and the Carnian origin of calcareous nannoplankton and dinosaurs. Geology 2006, 34:1009-1012.
23. Good S.C. Freshwater bivalve fauna of the Late Triassic (Carnian-Norian) Chinle, Dockum, and Dolores formations of the southwest United States. Bivalves: An Eon of Evolution - Paleobiological Studies Honoring Norman D. Newell 1998, 223-249. University of Calgary Press, Calgary. P.A. Johnson, J.W. Haggart (Eds.).
24. Gottesfeld A.S. Paleoecology of the lower part of the Chinle Formation. Mus. North. Ariz. Bull. 1972, 47:59-73.
25. Gottesfeld A.S. Palynology of the Chinle Formation. Mus. North. Ariz. Bull. 1972, 47:13-18. (Suppl.).
26. Gottesfeld A.S. Upper Triassic palynofloras of the western United States. Proceedings of the IV Interational Palynological Conference, Lucknow 2 1980, 295-308.
27. Heckert A.B. The tetrapod fauna of the Upper Triassic lower Chinle Group (Adamanian: latest Carnian) of the Zuni Mountains, west-central New Mexico. New Mexico Mus. Nat. Hist. Sci. Bull. 1997, 11:29-39.
28. Heckert A.B., Lucas S.G. Lower Chinle Group (Upper Triassic: Carnian) stratigraphy in the Zuni Mountains, west-central New Mexico. New Mexico Mus. Nat. Hist. Sci. Bull. 2002, 21:51-72.
29. Heckert A.B., Lucas S.G. Stratigraphy and paleontology of the lower Chinle Group (Adamanian-latest Carnian) in the vicinity of St. Johns, Arizona. New Mexico Geological Society Guidebook 2003, 54:281-288.
30. Heckert A.B., Lucas S.G., Sullivan R.M., Hunt A.P., Spielmann J.A. The vertebrate fauna of the Upper Triassic (Revueltian: early-mid Norian) Painted Desert Member (Petrified Forest Formation: Chinle Group) in the Chama Basin, northern New Mexico. New Mexico Geological Society Guidebook 2005, 56:302-318.
31. Heckert A.B., Lucas S.G., Dickinson W.R., Mortensen J.K. New ID-TIMS U-Pb ages for Chinle Group strata (Upper Triassic) in New Mexico and Arizona, correlation to the Newark Supergroup, and implications for the "long Norian". Geol. Soc. Am. Abstracts Prog. 2009, 41:123.
32. Hesselbo S.P., Robinson S.A., Surlyk F., Piasecki S. Terrestrial and marine extinction at the Triassic-Jurassic boundary synchronized with major carbon-cycle perturbation: a link to initiation of massive volcanism?. Geology 2002, 30:251-254.
33. Hodych J.P., Dunning G.R. Did the Manicouagan impact trigger end-of-Triassic mass extinction?. Geology 1992, 20:51-54.
34. Hunt A.P., Lucas S.G. Ornithischian dinosaurs from the Upper Triassic of the United States. In the Shadow of the Dinosaurs: Early Mesozoic Tetrapods 1994, 227-241. Cambridge University Press, Cambridge. N.C. Fraser, H.-D. Sues (Eds.).
35. Hunt A.P., Lucas S.G., Heckert A.B., Sullivan R.M., Lockley M.G. Late Triassic dinosaurs from the western United States. Geobios 1998, 31:511-531.
36. Irmis R.B. The vertebrate fauna of the Upper Triassic Chinle Formation in northern Arizona. Mesa Southwest Mus. Bull. 2005, 9:63-88.
37. Irmis R.B. Evaluating hypotheses for the early diversification of dinosaurs. Earth Environ. Sci. Trans. R. Soc. Edinburgh 2011, 101:397-426.
38. Irmis R., Mundil R. New age constraints from the Chinle Formation revise global comparisons of Late Triassic vertebrate assemblages. J. Vertebr. Paleontol. 2008, 28:95A. (Suppl.).
39. Irmis R.B., Mundil R. New U-Pb zircon ages from the Chinle Formation (western US) revise understanding of Late Triassic terrestrial vertebrate evolution. Geol. Soc. Am. Abstracts Prog. 2010, 42:393.
40. Irmis R.B., Whiteside J.H. Newly integrated approaches to studying Late Triassic terrestrial ecosystems. Palaios 2010, 25:689-691.
41. Irmis R.B., Nesbitt S.J., Padian K., Smith N.D., Turner A.H., Woody D., Downs A. A Late Triassic dinosauromorph assemblage from New Mexico and the rise of dinosaurs. Science 2007, 317:358-361.
42. Irmis R.B., Martz J.W., Parker W.G., Nesbitt S.J. Re-evaluating the correlation between Late Triassic terrestrial vertebrate biostratigraphy and the GSSP-defined marine stages. Albertiana 2010, 38:40-52.
43. Kent D.V., Tauxe L. Corrected Late Triassic latitudes for continents adjacent to the North Atlantic. Science 2005, 307:240-244.
44. Kirby R.E. A Vertebrate Fauna from the Upper Triassic Owl Rock Member of the Chinle Formation of Northern Arizona 1991, 476. Northern Arizona University, Flagstaff.
45. Langer M.C. Studies on continental Late Triassic tetrapod biochronology. II. The Ischigualastian and a Carnian global correlation. J. South Amer. Earth Sci. 2005, 19:219-239.
46. Langer M.C., Ribeiro A.M., Schultz C.L., Ferigolo J. The continental tetrapod-bearing Triassic of south Brazil. New Mexico Mus. Nat. Hist. Sci. Bull. 2007, 41:201-218.
47. Langer M.C., Ezcurra M.D., Bittencourt J.S., Novas F.E. The origin and early evolution of dinosaurs. Biol. Rev. 2010, 85:55-110.
48. Litwin R.J., Traverse A., Ash S.R. Preliminary palynological zonation of the Chinle Formation, southwestern U.S.A., and its correlation to the Newark Supergroup (eastern U.S.A.). Rev. Palaeobot. Palynol. 1991, 68:269-287.
49. Long R.A., Murry P.A. Late Triassic (Carnian and Norian) tetrapods from the southwestern United States. New Mexico Mus. Nat. Hist. Sci. Bull. 1995, 4:1-254.
50. Lucas S.G. The Chinle Group: revised stratigraphy and biochronology of Upper Triassic nonmarine strata in the western United States. Mus. North. Ariz. Bull. 1993, 59:27-50.
51. Lucas S.G. Global Triassic tetrapod biostratigraphy and biochronology. Palaeogeogr. Palaeoclimatol. Palaeoecol. 1998, 143:347-384.
52. Lucas S.G. A Triassic timescale 2009. Geol. Soc. Am. Abstracts Prog. 2009, 41:107.
53. Lucas S.G. The Triassic timescale based on nonmarine tetrapod biostratigraphy and biochronology. Geol. Soc. London Spec. Publ. 2010, 334:447-500.
54. Lucas S.G., Hayden S.N. Triassic stratigraphy of west-central New Mexico. New Mexico Geological Society Guidebook 1989, 40:191-211.
55. Lucas S.G., Hunt A.P. Tetrapod biochronology of the Chinle Group (Upper Triassic), western United States. New Mexico Mus. Nat. Hist. Sci. Bull. 1993, 3:327-329.
56. Lucas S.G., Hunt A.P., Long R.A. The oldest dinosaurs. Naturwissenschaften 1992, 79:171-172.
57. Lucas S.G., Heckert A.B., Hunt A.P. Stratigraphy and biochronological significance of the Late Triassic Placerias Quarry, eastern Arizona (U.S.A.). Neues Jahrbuch für Geologie und Paläontologie. Abhandlungen 1997, 203:23-46.
58. Lucas S.G., Hunt A.P., Heckert A.B., Spielmann J.A. Global Triassic tetrapod biostratigraphy and biochronology: 2007 status. New Mexico Mus. Nat. Hist. Sci. Bull. 2007, 41:229-240.
59. Ludwig K.R. User's Manual for Isoplot 3.6 2008, Berkeley Geochronology Center, Berkeley.
60. Martínez R.N., Sereno P.C., Alcober O.A., Colombi C.E., Renne P.R., Montañez I.P., Currie B.S. A basal dinosaur from the dawn of the dinosaur era in southwestern Pangaea. Science 2011, 331:206-210.
61. Martz J.W. Lithostratigraphy, Chemostratigraphy, and Vertebrate Biostratigraphy of the Dockum Group (Upper Triassic), of Southern Garza County, West Texas 2008, 504. Texas Tech University, Lubbock, TX.
62. Martz J.W., Parker W.G. Revised lithostratigraphy of the Sonsela Member (Chinle Formation, Upper Triassic) in the southern part of Petrified Forest National Park, Arizona. PLoS One 2010, 5(e9329):1-26.
63. Mattinson J.M. Zircon U-Pb chemical abrasion ("CA-TIMS") method: combined annealing and multi-step partial dissolution analysis for improved precision and accuracy of zircon ages. Chem. Geol. 2005, 220:47-66.
64. Miller D.S., Kulp J.L. Isotopic study of some Colorado Plateau ores. Econ. Geol. 1958, 53:937-948.
65. Miller D.S., Kulp J.L. Isotopic evidence on the origin of the Colorado Plateau uranium ores. Geol. Soc. Am. Bull. 1963, 74:609-630.
66. Mundil R. Critical view of the calibration of the Triassic time scale. New Mexico Mus. Nat. Hist. Sci. Bull. 2007, 41:314-315.
67. Mundil R., Metcalfe I., Ludwig K.R., Renne P.R., Oberli F., Nicholl R.S. Timing of the Permian-Triassic biotic crisis: implications from new zircon U/Pb age data (and their limitations). Earth Planet. Sci. Lett. 2001, 187:131-145.
68. Mundil R., Ludwig K.R., Metcalfe I., Renne P.R. Age and timing of the Permian mass extinctions: U/Pb dating of closed-system zircons. Science 2004, 305:1760-1763.
69. Mundil R., Gehrels G., Deino A.L., Irmis R.B. Zircon U-Pb analyses by TIMS and LA-ICPMS on the same material. Eos Trans. AGU 2008, 89(53 Supplement). (abstract V13A-2108).
70. Mundil R., Pálfy J., Renne P.R., Brack P. The Triassic time scale: new constraints and a review of geochronological data. Geol. Soc. London Spec. Publ. 2010, 334:41-60.
71. Muttoni G., Kent D.V., Olsen P.E., Di Stefano P., Lowrie W., Bernasconi S.M., Hernandez F.M. Tethyan magnetostratigraphy from Pizzo Mondello (Sicily) and correlation to the Late Triassic Newark astrochronological polarity time scale. Geol. Soc. Am. Bull. 2004, 116:1043-1058.
72. Muttoni G., Kent D.V., Jadoul F., Olsen P.E., Rigo M., Galli M.T., Nicora A. Rhaetian magneto-biostratigraphy from the southern Alps (Italy): constraints on Triassic chronology. Palaeogeogr. Palaeoclimatol. Palaeoecol. 2010, 285:1-16.
73. Nesbitt S.J., Irmis R.B., Parker W.G. A critical re-evaluation of the Late Triassic dinosaur taxa of North America. J. Syst. Palaeontol. 2007, 5:209-243.
74. Nesbitt S.J., Smith N.D., Irmis R.B., Turner A.H., Downs A., Norell M.A. A complete skeleton of a Late Triassic saurischian and the early evolution of dinosaurs. Science 2009, 326:1530-1533.
75. Nesbitt S.J., Irmis R.B., Parker W.G., Smith N.D., Turner A.H., Rowe T. Hindlimb osteology and distribution of basal dinosauromorphs from the Late Triassic of North America. J. Vertebr. Paleontol. 2009, 29:498-516.
76. Nesbitt S.J., Sidor C.A., Irmis R.B., Angielczyk K.D., Smith R.M.H., Tsuji L.A. Ecologically distinct dinosaurian sister group shows early diversification of Ornithodira. Nature 2010, 464:95-98.
77. Ogg J.G. The Triassic Period. A Geologic Time Scale 2004 2005, 271-306. Cambridge University Press, Cambridge. F.M. Gradstein, J.G. Ogg, A.G. Smith (Eds.).
78. Olsen P.E., Huber P. The oldest Late Triassic footprint assemblage from North America (Pekin Formation, Deep River Basin, North Carolina, USA). Southeast. Geol. 1998, 38:77-90.
79. Olsen P.E., Kent D.V., Sues H.-D., Koeberl C., Huber H., Montanari A., Rainforth E.C., Fowell S.J., Szajna M.J., Hartline B.W. Ascent of dinosaurs linked to an iridium anomaly at the Triassic-Jurassic boundary. Science 2002, 296:1305-1307.
80. Olsen P.E., Kent D.V., Whiteside J.H. Implications of the Newark Supergroup-based astrochronology and geomagnetic polarity time scale (Newark-APTS) for the tempo and mode of the early diversification of the Dinosauria. Earth Environ. Sci. Trans. R. Soc. Edinburgh 2011, 101:201-229.
81. Parker W.G. Faunal review of the Upper Triassic Chinle Formation of Arizona. Mesa Southwest Mus. Bull. 2005, 11:34-54.
82. Parker W.G. The stratigraphic distribution of major fossil localities in Petrified Forest National Park, Arizona. Mus. North. Ariz. Bull. 2006, 62:46-61.
83. Parker W.G., Barton B.J. New information on the Upper Triassic archosauriform Vancleavea campi based on new material from the Chinle Formation of Arizona. Palaeontol. Electron. 2008, 11(14A):11-20.
84. Parker W.G., Martz J.W. The Late Triassic (Norian) Adamanian-Revueltian tetrapod faunal transition in the Chinle Formation of Petrified Forest National Park, Arizona. Earth Environ. Sci. Trans. R. Soc. Edinburgh 2011, 101:231-260.
85. Parker W.G., Irmis R.B., Nesbitt S.J., Martz J.W., Browne L.S. The Late Triassic pseudosuchian Revueltosaurus callenderi and its implications for the diversity of early Ornithischian dinosaurs. Proc. R. Soc. London Biol. Sci. 2005, 272:963-969.
86. Payne J.L., Lehrmann D.J., Wei J., Orchard M.J., Schrag D.P., Knoll A.H. Large perturbations of the carbon cycle during recovery from the end-Permian extinction. Science 2004, 305:506-509.
87. Peirce H.W., Shafiqullah M., Breed W.J. Geochronology of some exotic cobbles, Chinle Formation, Arizona. Abstracts of the Symposium on Southwest Geology 1985, 7. Museum of Northern Arizona, Flagstaff.
88. Ramezani J., Bowring S.A., Pringle M.S., Winslow F.D., Rasbury E.T. The Manicouagan impact melt rock: a proposed standard for intercalibration of U-Pb and 40Ar/39Ar isotopic systems. 15th V.M. Goldsmidt Conference Abstract Volume, Moscow, ID 2005, A321.
89. Ramezani J., Bowring S.A., Fastovsky D.E., Hoke G.D. U/Pb ID-TIMS geochronology of the Late Triassic Chinle Formation, Petrified Forest National Park, Arizona. Geol. Soc. Am. Abstracts Prog. 2009, 41:421.
90. Rayfield E.J., Barrett P.M., McDonnell R.A., Willis K.J. A Geographical Information System (GIS) study of Triassic vertebrate biochronology. Geol. Mag. 2005, 142:327-354.
91. Rayfield E.J., Barrett P.M., Milner A.R. Utility and validity of Middle and Late Triassic 'land vertebrate faunachrons'. J. Vertebr. Paleontol. 2009, 29:80-87.
92. Renne P.R., Mundil R., Balco G., Min K., Ludwig K.R. Joint determination of 40K decay constants and 40Ar*/40K for the Fish Canyon sanidine standard, and improved accuracy for 40Ar/39Ar geochronology. Geochim. Cosmochim. Acta 2010, 74:5349-5367.
93. Riggs N.R., Lehman T.M., Gehrels G.E., dickinson W.R. Detrital zircon link between headwaters and terminus of the Upper Triassic Chinle-Dockum paleoriver system. Science 1996, 273:97-100.
94. Riggs N.R., Ash S.R., Barth A.P., Gehrels G.E., Wooden J.L. Isotopic age of the Black Forest Bed, Petrified Forest Member, Chinle Formation, Arizona: an example of dating a continental sandstone. Geol. Soc. Am. Bull. 2003, 115:1315-1323.
95. Rogers R.R., Swisher C.C., Sereno P.C., Monetta A.M., Forster C.A., Martínez R.N. The Ischigualasto tetrapod assemblage (Late Triassic, Argentina) and 40Ar/39Ar dating of dinosaur origins. Science 1993, 260:794-797.
96. Schmitt A.K., Stockli D.F., Lindsay J.M., Robertson R., Lovera O.M., Kislitsyn R. Episodic growth and homogenization of plutonic roots in arc volcanos from combined U/Th and (U/Th)/He zircon dating. Earth Planet. Sci. Lett. 2010, 295:91-103.
97. Schoene B., Guex J., Bartolini A., Schaltegger U., Blackburn T.J. Correlating the end-Triassic mass extinction and flood basalt volcanism at the 100ka level. Geology 2010, 38:387-390.
98. Schultz L.G. Clay minerals in Triassic rocks of the Colorado Plateau. U.S. Geol. Surv. Bull. 1963, 1147-C:C1-C71.
99. Schultz C.L. Biostratigraphy of the non-marine Triassic: is a global correlation based on tetrapod faunas possible?. Applied Stratigraphy 2005, 123-145. Springer, Dordrecht. E.A.M. Koutsoukos (Ed.).
100. Shipman T.C. Links Between Sediment Accumulation Rates and the Development of Alluvial Architecture: Triassic Ischigualasto Formation, northwestern Argentina, Department of Geosciences 2004, 187. University of Arizona, Tucson.
101. Small B. A Late Triassic dinosauromorph assemblage from the Eagle Basin (Chinle Formation), Colorado, U.S.A. J. Vertebr. Paleontol. 2009, 29:182A. (Suppl.).
102. Steiner M.B., Lucas S.G. Paleomagnetism of the Late Triassic Petrified Forest Formation, Chinle Group, western United States: further evidence of "large" rotation of the Colorado Plateau. J. Geophys. Res. B 2000, 105:25791-25808.
103. Stewart J.H., Poole F.G., Wilson R.F. Stratigraphy and origin of the Chinle Formation and related Upper Triassic strata in the Colorado Plateau region. U.S. Geol. Surv. Prof. Pap. 1972, 690:1-336.
104. Stone J.F. Pollen and spores. BYU Geol. Stud. 1978, 25:45-59.
105. Valencio D.A., Mendía J.E., Vilas J.F. Palaeomagnetism and K/Ar ages of Triassic igneous rocks from the Ischigualasto-Ischichuca Basin and Puesto Viejo Formation, Argentina. Earth Planet. Sci. Lett. 1975, 26:319-330.
106. Whiteside J.H., Olsen P.E., Eglinton T., Brookfield M.E., Sambrotto R.N. Compound-specific carbon isotopes from Earth's largest flood basalt province directly link eruptions to the end-Triassic mass extinction. Proc Natl. Acad. Sci. 2010, 107:6721-6725.
107. Woody D.T. Revised stratigraphy of the lower Chinle Formation (Upper Triassic) of Petrified Forest National Park, Arizona. Mus. North. Ariz. Bull. 2006, 62:17-45.
108. Zeigler K.E., Geissman J.W. Magnetostratigraphy of the Upper Triassic Chinle Group of New Mexico: implications for regional and global correlations among Upper Triassic sequences. Geosphere 2011, 7:802-829.
109. Zerfass H., Chemale F., Schultz C.L., Lavina E. Tectonics and sedimentation in southern South America during Triassic. Sediment. Geol. 2004, 166:265-292.