Nugget Sandstone


The Nugget Sandstone is a Late Triassic to Early Jurassic geologic formation that outcrops in Colorado, Idaho, Wyoming, and Utah, western United States.
In Wyoming, it is composed of a lower hematite-stained siltstone and thin-bedded sandstone. The upper part is a salmon-pink and light-gray, fine- to medium-grained cliff-forming sandstone that exhibits massive bedding to large scale cross-beds of dunes. Thickness ranges up to 86.9 m.
Fossil theropod tracks have been reported from the formation.

Fossil content

Intermediate theropod, sphenosuchian, drepanosaurid and sphenodontian remains are known.
;Other fossilsRhynchosauroides sp.

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.