A Grallator-dominated tracksite from the Chinle Group (Late Triassic), Moab, Utah

• Autorzy: Lockley M. G. , Gierlinski G. D.
• Języki publikacji: EN

Abstrakty

EN

Two roadside localities on the northern fringes of Moab, Grand County, Utah yield previously un-described Upper Triassic vertebrate tracks from the Chinle Group (Rock Point Formation). The first locality, designated the high way 191 site, yields dozens of small theropod dinosaur tracks (Grallator) preserved on a single, fallen slab. The tracks form a monospecific assemblage preserved as natural casts. The assemblage is representative of what has been referred to as Rhaetic assemblage II which is dominated by small Grallator tracks. In situ Grallator tracks are also described from a nearby locality, referred to as the Matrimony Spring site, where they are found in association with the ichnogenus Brachychirotherium. Many other sites with similar, often more-diverse, Late Triassic ichnofaunas are known from the region.

Słowa kluczowe

EN

Utah; Moab; Chinle Group; footprints; theropod dinosaurs; Grallator

• Wydawca: Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
• Czasopismo: Geological Quarterly
• Rocznik: 2009
• Tom: Vol. 53, No 4
• Strony: 433--440
• Opis fizyczny: bibliogr. 24 poz., rys., tab.

Twórcy

autor

Lockley M. G.

autor

Gierlinski G. D.

• Dinosaur Tracks Museum, University of Colorado at Denver, PO Box 173364, Denver, Colorado, 80217, U.S.A,

Bibliografia

• COLBERT E. H. (1989) - The Triassic dinosaur Coelophysis. Mus. Northern Arizona Bull., 57: 1-160.
• D'ORAZI PORCHETTI S. and NICOSIA U. (2007) - Reexamination of some large Early Mesozoic tetrapod footprints from the African collection of Paul Ellenberger. Ichnos, 13: 219-246.
• ELLENBERGER P. (1972) - Contribution a la classification des pistes de vertébrés du Trias: Les types du Stromberg d'Afrique du Sud (I). Palaeovertebrata, Mém. Extraordinaire.
• ELLENBERGER P. (1974) - Contribution a la classification des pistes de vertébrés du Trias: Les types du Stromberg d'Afrique du Sud (II partie: Le Stromberg superieur - I. LebiomedelazoneB/1 ouniveau de Moyeni: ses biocenoses). Palaeovertebrata, Mém. Extraordinaire.
• GASTON R., LOCKLEY M. G., LUCAS S. G and HUNT A. P. (2003) - Grallator-dominated fossil footprint assemblages and associated enigmatic footprints from the Chinle Group (Upper Triassic), Gateway area, Colorado. Ichnos, 10: 151-163.
• HADERER F. O. (1992) - Ein weitere grallatorider Fährtenrest aus dem Stubensandstein des Starmborgs (Nordwurttemburg). Jb. Geselsch. Naturkunde Wűrtenburg, 147: 5-10.
• HAUBOLD H. (1984) - Saurierfahrten (2nd Edition). A. Ziemsen Verlag, Wittenberg Lutherstadt.
• HAUBOLD H. (1986) - Archosaur footprints at the terrestrial Triassic-Jurassic transition. In: The Beginning of the Age of Dinosaurs: Faunal Change across the Triassic-Jurassic Boundary (ed. K. Padian): 189-201. Cambridge University Press.
• HUNT A. P. and LUCAS S. G. (1992) - Stratigraphic distribution and age of vertebrate tracks in the Chinle Group (Upper Triassic), western North America. Geol. Soc. Am., Abstracts with Programs, 24 (6): 19.
• HUNT A. P., LUCAS S. G., LOCKLEY M. G. and HECKERT A. B. (2000) - Occurrence of the dinosaurian ichnogenus Grallator, in the Redonda Formation (Upper Triassic: Norian) of Eastern New Mexico. In: Dinosaurs of New Mexico (eds. S. G. Lucas and A. B. Heckert). New Mexico Mus. Nat. Hist. Sc. Bull., 17: 39-41.
• LOCKLEY M. G., CONRAD K., PAQUETTE M. and HAMBLIN A. (1992a) - Late Triassic vertebrate tracks in the Dinosaur National Monument area. In: Utah Geol. Surv. Misc. Publ. (ed. J. R. Wilson), 92 (3): 383-391.
• LOCKLEYM. G. and EISENBER G L. (2006) - Apreliminary report on a spectacular dinosaur tracksite in the Chinle Group, Dirty Devil River valley, Wayne County, Utah. New Mexico Mus. Nat. Hist. Sc., Bull. 37: 263-268.
• LOCKLEY M. G. and HUNT A. P. ( 1995) - Dinosaur tracks and other fossil footprints of the western United States. Columbia University Press, New York.
• LOCKLEYM. G., KING M. J., HOWE S. and SHARP T. (1996) - Dinosaur tracks and other archosaur footprints from the Triassic of South Wales. Ichnos, 5: 23-41.
• LOCKLEY M. G., LUCAS S. G., GASTON R. and HUNT A. P. (2004) - Ichnofaunas from the Triassic-Jurassic boundary sequences of the Gateway area, Western Colorado: implications for faunal composition and correlations with other areas. Ichnos, 11: 89-102.
• LOCKLEYM. G., LUCAS S. G. and HUNT A. P. (2006a) -Evazoum and the renaming of northern hemisphere "Pseudotetrasauropus": implications for tetrapod ichnotaxonomy at the Triassic-Jurassic boundary. NewMexico Mus. Nat. Hist. Sc. Bull., 37: 199-206.
• LOCKLEY M. G., LUCAS S. G. and HUNT A. P. (2006b) - Eosauropus, a new name for a Late Triassic track: further observations on the Late Triassic ichnogenus Tetrasauropus and related forms, with notes on the limits of interpretation: In: The Triassic-Jurassic Terrestrial Transition (eds. H. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner and J. I. Kirkland). New Mexico Mus. Natur. History Sc. Bull., 37: 193-198.
• LOCKLEY M. G. and MEYER C. A. (2000) - Dinosaur tracks and other fossil footprints of Europe. Columbia University Press. New York.
• LOCKLEYM. G., SANTOS V. F. and HUNT A. P. (1993) - A Late Triassic tracksite from the Sheep Pen Sandstone, Sloan Canyon, Cimarron Valley, New Mexico. In: The Nonmarine Triassic (eds. S. G. Lucas and M. Morales). New Mexico Mus. Nat. Hist. Sc. Bull., 3: 285-288.
• LUCAS S. G. (1991) - Revised Upper Triassic stratigraphy in the San Rafael Swell Utah. In: Geology of East Central Utah (ed. T. C. Chidsey, Jr.). Utah Geol. Ass. Publ., 19: 1-8.
• LUCAS S. G., HAUBOLD H., KLEIN H., LOCKLEY M. G., HUNT A., HECKERT A. and THULBORN R. A. (2005) - Triassic records of the theropod footprint ichnogenus Eubrontes. J. Vertebr. Paleont., 25: 85A.
• NICOSIA U. and LOI M. (2003) - Triassic footprints from Lerici (La Spezia, northern Italy). Ichnos, 10: 127-140.
• OLSEN P. E., KENT D. V., SUES H. D., KOEBERL C., HUBER H., MONTANARI A., RAINFORTH E. C., FOWELL S. J., SZAJNAM. J. and HARTLINE B. W. (2002) - Ascent of dinosaurs linked to an iridium anomaly at the Triassic-Jurassic boundary. Science, 296: 1305-1307.
• THULBORN R. A. (1990) - Dinosaur Tracks. Chapman and Hall, London.