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Geology and taphonomy of the Coelophysis quarry, Upper Triassic Chinle Formation, Ghost Ranch, New Mexico

Published online by Cambridge University Press:  20 May 2016

Hilde L. Schwartz  and
David D. Gillette
Hilde L. Schwartz
Affiliation:
Route 3, Box 93-JS, Santa Fe, New Mexico 87505
David D. Gillette
Affiliation:
Division of State History, 300 Rio Grande, Salt Lake City, Utah 84101
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Abstract

The Coelophysis dinosaur quarry at Ghost Ranch, near Abiquiu, New Mexico, is unique among Triassic fossil sites for its yield of numerous complete and partial skeletons of a single species of theropod dinosaur (Coelophysis bauri). Since its discovery in 1947 by E. H. Colbert in the red siltstone beds of the Upper Triassic Chinle Formation, the quarry has yielded the remains of at least 1,000 individuals from approximately 30 cubic meters of excavated material. The main bone-bearing strata are abandoned channel deposits that are part of a siltstone overbank sequence. The Coelophysis remains found at the quarry are remarkably whole and well preserved, though they range in degree of articulation from complete skeletons to isolated limbs and bones. Skeletons, partial skeletons, and bones are crudely aligned and show little evidence of predator or scavenger disturbance or surface weathering. Geologic and taphonomic evidence suggests that the dinosaurs preserved in the Ghost Ranch quarry were transported to the site as carcasses by fluvial currents. The carcasses blocked a small channel and were subsequently buried by silts. Petrographic study and neutron activation analysis reveal no evidence of volcanic ash, paleopathologic osteology, or unusual chemistry in the quarry bone and sediments. The virtual monospecificity, taphonomy, and ecology of the assemblage suggest that the dinosaurs perished due to a regional environmental crisis, such as drought.

Type
Research Article
Information
Journal of Paleontology , Volume 68 , Issue 5 , September 1994 , pp. 1118 - 1130
Copyright
Copyright © The Paleontological Society 

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References

Ash, S. R. 1972. Plant megafossils of the Chinle Formation. Museum of Northern Arizona Bulletin, 47:23–43.Google Scholar
Ash, S. R. 1978. Geology, paleontology, and paleoecology of a Late Triassic lake, western New Mexico. Brigham Young University, Geology Studies, 25, 100 p.Google Scholar
Auffenberg, W. 1981. The Behavioral Ecology of the Komodo Monitor. University of Florida Book, Gainesville, 406 p.Google Scholar
Bakker, R. T. 1986. The Dinosaur Heresies. William Morrow and Co., New York, 481 p.Google Scholar
Behrensmeyer, A. K. 1978. Taxonomic and ecologic information from bone weathering. Paleobiology, 4:150–162.CrossRefGoogle Scholar
Behrensmeyer, A. K. 1981. Vertebrate paleoecology in a Recent East African ecosystem, p. 591–615. In Gray, J., Boucot, A. J., and Berry, W. B. N. (eds.), Communities of the Past. Hutchinson Ross Publishing Company, Stroudsburg, Pennsylvania.Google Scholar
Behrensmeyer, A. K. 1987. Miocene fluvial facies and vertebrate taphonomy in northern Pakistan, p. 169–176. In Ethridge, F. G., Flores, R. M., and Harvey, M. D. (eds.), Recent Developments in Fluvial Sedimentology. Society of Economic Paleontologists and Mineralogists, Special Publication 39.CrossRefGoogle Scholar
Behrensmeyer, A. K. 1988. Vertebrate preservation in fluvial channels. Palaeogeography, Palaeoclimatology, and Palaeoecology, 63:183–199.CrossRefGoogle Scholar
Berman, D. S., Reisz, R. R., and Eberth, D. A. 1985. Ecolsonia cutlerensis, an Early Permian dissorophid amphibian from the Cutler Formation of north-central New Mexico. New Mexico Bureau of Mines and Mineral Resources, Circular 191, 31 p.CrossRefGoogle Scholar
Blakey, R. C., and Gubitosa, R. 1983. Late Triassic paleogeography and depositional history of the Chinle Formation, southern Utah and northern Arizona, p. 57–76. In Reynolds, M. W. and Dolly, E. D. (eds.), Mesozoic Paleogeography of the Western-Central United States. Rocky Mountain Section, Society of Economic Paleontologists and Mineralogists.Google Scholar
Bridge, J. S. 1985. Paleochannel patterns inferred from alluvial deposits: a critical evaluation. Journal of Sedimentary Petrology, 55:579–589.Google Scholar
Colbert, E. H. 1947. The little dinosaurs of Ghost Ranch. Natural History, 59:392–399, 427–428.Google Scholar
Colbert, E. H. 1964. The Triassic genera Podokesaurus and Coelophysis . American Museum Novitates, 2168:1–12.Google Scholar
Colbert, E. H. 1972. Vertebrates from the Chinle Formation. Museum of Northern Arizona Bulletin, 47:1–11.Google Scholar
Colbert, E. H. 1974. The Triassic paleontology of Ghost Ranch, New Mexico. New Mexico Geological Society Guidebook, 25th Field Conference:175–178.Google Scholar
Colbert, E. H. 1987. Arthur and Phoebe Pack and the dinosaurs of Ghost Ranch. Ghost Ranch Journal, 2:12–14.Google Scholar
Colbert, E. H. 1989. The Triassic dinosaur Coelophysis . Museum of Northern Arizona Bulletin 57, 160 p.Google Scholar
Colbert, E. H. 1990. Variation in Coelophysis , p. 81–90. In Carpenter, K. and Currie, P. J. (eds.), Dinosaur Systematics: Approaches and Perspectives. Cambridge University Press, New York.CrossRefGoogle Scholar
Colbert, E. H., and Gregory, J. T. 1957. Correlation of continental Triassic sediments by vertebrate fossils. Geological Society of America Bulletin, 68:1456–1467.Google Scholar
Colbert, E. H., Charig, A. J., Dodson, P., Gillette, D. D., Ostrom, J. H., and Weishampel, D. 1992. Coelurus bauri Cope 1887 (currently Coelophysis bauri; Reptilia, Saurischia): proposed replacement of the lectotype by a neotype, Case 2840. Bulletin of Zoological Nomenclature, 49:276–279.Google Scholar
Conybeare, A., and Haynes, G. 1984. Observations on elephant mortality and bones in water holes. Quaternary Research, 22:189–200.CrossRefGoogle Scholar
Cooley, M. E., and Davidson, E. S. 1963. The Mogollon Highlands—their influence on Mesozoic and Cenozoic erosion and sedimentation. Arizona Geological Society Digest, 6:7–35.Google Scholar
Cope, E. D. 1887. The dinosaurian genus Coelurus . American Naturalist, 21:367–369.Google Scholar
Daugherty, L. H. 1941. The Upper Triassic flora of Arizona. Carnegie Institute of Washington Publication 526, 108 p.Google Scholar
Dubiel, R. F. 1987. Sedimentology and new fossil occurrences of the Upper Triassic Chinle Formation, southeastern Utah. Four Corners Geological Society Guidebook, 10th Field Conference, Cataract Canyon, p. 99–107.Google Scholar
Dubiel, R. F. 1989a. Depositional and climatic setting of the Upper Triassic Chinle Formation, Colorado Plateau, p. 171–187. In Lucas, S. G. and Hunt, A. P. (eds.), Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History, Albuquerque.Google Scholar
Dubiel, R. F. 1989b. Sedimentology and revised nomenclature of the Upper Triassic Chinle Formation and the Lower Jurassic Wingate Sandstone. New Mexico Geological Society, 40th Field Conference Guidebook, 38 p.Google Scholar
Dubiel, R. F., Blodgett, R. H., and Bown, T. M. 1987. Lungfish burrows in the Upper Triassic Chinle and Dolores Formation, Colorado Plateau. Journal of Sedimentary Petrology, 57:512–521.Google Scholar
Dubiel, R. F., Parrish, J. T., Parrish, J. M., and Good, S. C. 1991. The Pangaean megamonsoon—evidence from the Upper Triassic Chinle Formation, Colorado Plateau. Palaios, 6:347–370.CrossRefGoogle Scholar
Eberth, D. A., and Berman, D. S. 1983. Sedimentology and paleontology of Lower Permian fluvial redbuds of north-central New Mexico—preliminary report. New Mexico Geology, 5:21–25.CrossRefGoogle Scholar
Gillette, D. D. 1986. A new place for old bones. Ghost Ranch Journal, 1:2–6.Google Scholar
Gillette, J. L. 1989. A century of dinosaurs and their discoverers at Ghost Ranch, Pt. III—the Colbert years. Ghost Ranch Journal, 4:6–10.Google Scholar
Good, S. C., Parrish, J. M., and Dubiel, R. F. 1987. Paleoenvironmental implications of sedimentology and paleontology of the Upper Triassic Chinle Formation, southeastern Utah. Four Corners Geological Society Guidebook, 10th Field Conference, Cataract Canyon, p. 117–118.Google Scholar
Gottesfeld, A. S. 1972. Paleoecology of the lower part of the Chinle Formation in the Petrified Forest. Museum of Northern Arizona Bulletin, 47:59–73.Google Scholar
Haynes, G. 1988. Mass deaths and serial predation: comparative taphonomic studies of modern large mammal death sites. Journal of Archaeological Science, 15:219–235.CrossRefGoogle Scholar
Henshaw, J. 1972. Notes on conflict between elephants and some bovids and on other inter-specific contacts in Yankari Game Reserve, N. E. Nigeria. East African Wildlife Journal, 10:151–153.Google Scholar
Hillman, J. C., and Hillman, A. K. K. 1977. Mortality of wildlife in Nairobi National Park, during the drought of 1973–1974. East African Wildlife Journal, 15:1–18.CrossRefGoogle Scholar
Hook, R. W., and Ferm, J. C. 1985. A depositional model for the Linton tetrapod assemblage (Westphalian D. Upper Carboniferous) and its palaeoenvironmental significance. Philosophical Transactions of the Royal Society of London, B311:101–109.Google Scholar
Hunt, A. P., and Lucas, S. G. 1989a. Late Triassic vertebrate localities in New Mexico, p. 72–101. In Lucas, S. G. and Hunt, A. P. (eds.), Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History, Albuquerque.Google Scholar
Hunt, A. P., and Lucas, S. G. 1989b. Stratigraphy and vertebrate biochronology of Upper Triassic strata in the Chama Basin, north-central New Mexico. Abstracts of the Symposium on Southwestern Geology and Paleontology, Museum of Northern Arizona, p. 15.Google Scholar
Hunt, A. P., and Lucas, S. G. 1991. Rioarribasaurus, a new name for a Late Triassic dinosaur from New Mexico (USA). Palaeontologische Zeitschrift, 65:191–198.CrossRefGoogle Scholar
Hunt, A. P., and Lucas, S. G. 1993. Comments on a proposed neotype for Coelophysis bauri (Cope, 1887) (Reptilia, Saurischia). Bulletin of Zoological Nomenclature, 50:147–150.CrossRefGoogle Scholar
Kraus, M. J., and Middleton, L. T. 1987. Dissected paleotopography and base-level changes in a Triassic fluvial sequence. Geology, 15:18–21.2.0.CO;2>CrossRefGoogle Scholar
Kurtén, B. 1953. On the variation and population dynamics of fossil and recent mammal populations. Acta Zoologica Fennica, 76:5–122.Google Scholar
Laporte, L. F., and Behrensmeyer, A. K. 1980. Tracks and substrate reworking by terrestrial vertebrates in Quaternary sediments of Kenya. Journal of Sedimentary Petrology, 50:1337–1346.Google Scholar
Litwin, R. J., Traverse, A., and Ash, S. R. 1991. Preliminary palynological zonation of the Chinle Formation, southwestern U.S.A., and its correlation to the Newark Supergroup (eastern U.S.A.). Review of Palaeobotany and Palynology, 68:269–287.CrossRefGoogle Scholar
Long, R. A., and Padian, K. 1986. Vertebrate biostratigraphy of the Late Triassic Chinle Formation, Petrified Forest National Park, Arizona: preliminary results, p. 161–169. In Padian, K. (ed.), The Beginning of the Age of Dinosaurs. Cambridge University Press, New York.Google Scholar
Lucas, S. G. 1991. Correlation of Triassic strata of the Colorado Plateau and southern High Plains, New Mexico. New Mexico Bureau of Mines and Mineral Resources Bulletin, 137:47–56.Google Scholar
Lucas, S. G., and Hunt, A. P. 1992. Triassic stratigraphy and paleontology; Chama basin and adjacent areas, north-central New Mexico, p. 151–172. In Lucas, S. G., Kues, B. S., Williamson, T. E., and Hunt, A. P. (eds.), San Juan Basin IV. New Mexico Geological Society, Socorro.CrossRefGoogle Scholar
Martill, D. M., and Turnbull, W. D. 1986. Taphonomy and preservation of a monospecific titanothere assemblage from the Washakie Formation (Late Eocene), southern Wyoming. North American Paleontological Convention IV, Boulder, Colorado, p. A53.Google Scholar
Murry, P. A. 1989. Microvertebrate fossils from the Petrified Forest and Owl Rock Members (Chinle Formation) in Petrified Forest National Park and vicinity, Arizona, p. 249–277. In Lucas, S. G. and Hunt, A. P. (eds.), Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History, Albuquerque.Google Scholar
Murry, P. A., and Long, R. A. 1989. Geology and paleontology of the Chinle Formation, Petrified Forest National Park and vicinity, Arizona and a discussion of vertebrate fossils of the southwestern Upper Triassic, p. 29–64. In Lucas, S. G. and Hunt, A. P. (eds.), Dawn of the Age of Dinosaurs in the American Southwest. New Mexico Museum of Natural History, Albuquerque.Google Scholar
Oakley, K. P. 1950. The fluorine dating method. Yearbook of Physical Anthropology, 5:44–52.Google Scholar
Orr, R. T. 1970. Animals in Migration. Macmillan Company, London, 303 p.Google Scholar
O'Sullivan, R. B. 1974. The Upper Triassic Chinle Formation in north-central New Mexico. New Mexico Geological Society, 25th Field Conference, Guidebook, 25:171–174.Google Scholar
O'Sullivan, R. B. 1977. Triassic rocks in the San Juan Basin of New Mexico and adjacent areas. New Mexico Geological Society, 28th Field Conference, Guidebook, 28:139–146.Google Scholar
Padian, K. 1986. On the type material of Coelophysis Cope (Saurischia; Theropoda) and a new specimen from the Petrified Forest of Arizona (Late Triassic: Chinle Formation), p. 45–60. In Padian, K. (ed.), The Beginning of the Age of Dinosaurs: Faunal Change Across the Triassic-Jurassic Boundary. Cambridge University Press, New York.Google Scholar
Parrish, J. M. 1989. Vertebrate paleoecology of the Chinle Formation (Late Triassic) of the southwestern United States. Palaeogeography, Palaeoclimatology, Palaeoecology, 72:227–247.CrossRefGoogle Scholar
Parrish, J. M., and Long, R. A. 1983. Vertebrate paleoecology of the Upper Triassic Chinle Formation, Petrified Forest and vicinity. Geological Society of America, Abstracts with Programs, 15:285.Google Scholar
Parrish, J. T., and Peterson, F. 1988. Wind directions predicted from global circulation models and wind directions determined from eolian sandstones of the western United States—a comparison. Sedimentary Geology, 56:261–282.CrossRefGoogle Scholar
Pipiringos, G. N., and O'Sullivan, R. B. 1978. Principal unconformities in Triassic and Jurassic rocks, Western Interior United States—a preliminary survey. U.S. Geological Survey, Professional Paper 1035-A, 29 p.Google Scholar
Posner, A. S., Eanes, E. D., Harper, R. A., and Zipkin, I. 1963. X-ray diffraction analysis of the effect of fluorine on human bone apatite. Archives of Oral Biology, 8:549–570.CrossRefGoogle Scholar
Potts, R. 1986. Temporal span of bone accumulations at Olduvai Gorge and implications for early hominid foraging behavior. Paleobiology, 12:25–31.CrossRefGoogle Scholar
Ratkevich, R. P. 1976. Dinosaurs of the Southwest. University of New Mexico Press, Albuquerque, 115 p.Google Scholar
Repenning, C. A., Cooley, M. E., and Akers, J. P. 1969. Stratigraphy of the Chinle and Moenkopi Formations, Navajo and Hopi Indian Reservations, Arizona, New Mexico and Utah. U.S. Geological Survey, Professional Paper 521-B, 34 p.Google Scholar
Rogers, R. R. 1991. Taphonomy of three dinosaur bone beds in the Upper Cretaceous Two Medicine Formation of northwestern Montana: evidence for drought-related mortality. Palaios, 5:394–413.CrossRefGoogle Scholar
Rowe, T., and Gauthier, J. 1991. Ceratosauria, p. 151–168. In Weishampel, D. B., Dodson, P., and Osmolska, H. (eds.), The Dinosauria. University of California Press, Berkeley.Google Scholar
Sander, P. M. 1992. The Norian Plateosaurus bonebeds of central Europe and their taphonomy. Palaeogeography, Palaeoclimatology, Palaeoecology, 93:255–299.CrossRefGoogle Scholar
Sarjeant, W. A. S. 1975. Fossil tracks and impressions of vertebrates, p. 283–324. In Frey, R. W. (ed.), The Study of Trace Fossils. Springer-Verlag, Berlin.CrossRefGoogle Scholar
Schaller, G. B. 1972. The Serengeti Lion. University of Chicago Press, Chicago, 480 p.Google Scholar
Schwartz, H. L., and Gillette, D. D. 1986. Microstratigraphy and sedimentology of the Coelophysis quarry (Upper Triassic, Chinle Formation) at Ghost Ranch, Abiquiu, New Mexico. North American Paleontological Convention IV, Boulder, Colorado, p. A41.Google Scholar
Sereno, P. C., and Novas, F. E. 1992. The complete skull and skeleton of an early dinosaur. Science, 258:1137–1140.CrossRefGoogle ScholarPubMed
Sereno, P. C., Forster, C. A., Rogers, R. R., and Monetta, A. M. 1993. Primitive dinosaur skeleton from Argentina and the early evolution of the Dinosauria. Nature, 361:64–66.CrossRefGoogle Scholar
Shipman, P. 1975. Implications of drought for vertebrate fossil assemblages. Nature, 257:667–668.CrossRefGoogle Scholar
Sinclair, A. R. E., and Norton-Griffiths, M. 1979. Serengeti: Dynamics of an Ecosystem. University of Chicago Press, 389 p.Google Scholar
Smith, C. T., Budding, A. J., and Pitrat, C. W. 1961. Geology of the southeastern part of the Chama Basin. New Mexico Bureau of Mines and Mineral Resources, Bulletin 75, 57 p.Google Scholar
Smith, R. M. H. 1980. The lithology, sedimentology, and taphonomy of flood-plain deposits of the Lower Beaufort (Adelaide Subgroup) strata near Beaufort West. Transactions of the Geological Society of South Africa, 83:399–413.Google Scholar
Sternberg, C. M. 1970. Comments on dinosaurian preservation in the Cretaceous of Alberta and Wyoming. National Museum of Canada, Publications in Paleontology, 4:1–9.Google Scholar
Stewart, D. J. 1981. A field guide to the Wealden Group of the Hastings area and the Isle of Wight, p. 1–30. In Elliot, T. (ed.), Field Guides to Modern and Ancient Fluvial Systems in Britain and Spain. Proceedings, Second International Conference on Fluvial Sedimentology, Keele, United Kingdom.Google Scholar
Stewart, J. H., Poole, F. G., and Wilson, R. R. 1972. Stratigraphy and origin of the Chinle Formation and related Upper Triassic strata in the Colorado Plateau region. U.S. Geological Survey, Professional Paper 690, 333 p.Google Scholar
Stock, C. 1956. A Record of Pleistocene Life in California. Los Angeles County Museum, Paleontology Series no. 11, 83 p.Google Scholar
Taylor, G., and Woodyer, K. D. 1978. Bank deposition in suspended-load streams, p. 257–275. In Miall, A. D. (ed.), Fluvial Sedimentology. Canadian Society of Petroleum Geologists, Memoir 5.Google Scholar
Toots, H. 1965. Random orientation of fossils and its significance. University of Wyoming, Contributions to Geology, 4:59–62.Google Scholar
Van der Lingen, G. J., and Andrews, P. B. 1969. Hoofprint structures in beach sand. Journal of Sedimentary Petrology, 39:350–357.CrossRefGoogle Scholar
Visser, J., and Thomas, R. G. 1986. Sedimentology and taphonomy of a Styracosaurus bone bed in the Late Cretaceous Judith River Formation, Dinosaur Provincial Park, Alberta. North American Paleontological Convention IV, University of Colorado, Boulder, p. A47.Google Scholar
Voorhies, M. R. 1969. Taphonomy and population dynamics of an Early Pliocene vertebrate fauna, Knox County, Nebraska. University of Wyoming, Contributions to Geology, Special Paper 1, 69 p.Google Scholar
Weigelt, J. 1989. Recent Vertebrate Carcasses and their Paleobiological Implications. University of Chicago Press, 188 p.CrossRefGoogle Scholar
Wiman, C. 1913. Über die paläontologische Bedeutung des Massensterbens unter den Tieren. Paläontologische Zeitschrift, 1:145–154.CrossRefGoogle Scholar