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The Nugget Sandstone is a
The Nugget Sandstone is a Late Triassic
The Late Triassic is the third and final epoch (geology), epoch of the Triassic geologic time scale, Period in the geologic time scale, spanning the time between annum, Ma and Ma (million years ago). It is preceded by the Middle Triassic Epoch ...
to Early Jurassic
The Early Jurassic Epoch (geology), Epoch (in chronostratigraphy corresponding to the Lower Jurassic series (stratigraphy), Series) is the earliest of three epochs of the Jurassic Period. The Early Jurassic starts immediately after the Triassic-J ...
geologic formation
Formation may refer to:
Linguistics
* Back-formation, the process of creating a new lexeme by removing or affixes
* Word formation, the creation of a new word by adding affixes
Mathematics and science
* Cave formation or speleothem, a secondar ...
that outcrops in Colorado, Idaho and Utah, western United States
The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territorie ...
. Fossil theropod
Theropoda (; ), whose members are known as theropods, is a dinosaur clade that is characterized by hollow bones and three toes and claws on each limb. Theropods are generally classed as a group of saurischian dinosaurs. They were ancestrally c ...
tracks have been reported from the formation.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
Fossil content
Intermediate theropod, sphenosuchian, drepanosaurid and sphenodontian remains are known.B. B. Britt, D. J. Chure, G. F. Engelmann and J. D. Shumway. 2016. Rise of the erg—paleontology and paleoenvironments of the Triassic-Jurassic transition in northeastern Utah. Geology of the Intermountain West 3:1-32 ;Other fossils * '' Rhynchosauroides sp.'' * Lepidosauria indet.Ichnofossils
* '' Batrachopus sp.'' * '' Brachychirotherium sp.'' * '' Brasilichnium sp.'' * '' Cochlichnus sp.'' * '' Diplichnites sp.'' * '' Grallator (Eubrontes)'' * '' Gwyneddichnium sp.'' * '' Octopodichnus sp.'' * '' Otozoum sp.'' * '' cf. Paleohelcura sp.'' * '' Pterichnus sp.'' * '' Scoyenia sp.'' * '' Treptichnus sp.'' * '' ?Acanthichnus sp.'' * '' ?Apatopus sp.''See also
*List of pterosaur-bearing stratigraphic units
This is a list of stratigraphic units, where pterosaur fossils have been recovered from. Units listed are all either formation rank or higher (e.g. group).
See also
* Pterosaur
* List of fossil sites
This list of fossil sites is a worldw ...
* List of dinosaur-bearing rock formations
This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented.
Containing body fossils
* List of stratigraphic units with dinosaur body fossils
** List of stratigraphic units with few ...
** List of stratigraphic units with theropod tracks
The following tables list the global geological sites where tracks of theropod dinosaurs have been found, together with the proper names of the rock formations (stratigraphic units) that contain them.
Non-avian theropods
Avialans
See also
*L ...
References
Bibliography
* Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp.Further reading
* * * {{cite journal , first1=M. G. , last1=Lockley , year=1986 , title=A Guide to Dinosaur Tracksites of the Colorado Plateau and American Southwest , journal=University of Colorado at Denver Geology Department Magazine , volume=Special Issue 1 , pages=1–56 Geologic formations of Colorado Geologic formations of Idaho Geologic formations of Utah Triassic System of North America Norian Stage Rhaetian Stage Jurassic System of North America Hettangian Stage Sinemurian Stage Pliensbachian Stage Toarcian Stage Sandstone formations of the United States Fluvial deposits Lacustrine deposits Ichnofossiliferous formations Paleontology in Colorado Paleontology in Idaho Paleontology in Utah