Vermillion Creek tracksite (Triassic to of the United States)

Also known as Moffat County, Vermilion, CU 165

Where: Moffat County, Colorado (40.8° N, 108.9° W: paleocoordinates 16.9° N, 46.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Bell Springs Member (Nugget Sandstone Formation), Norian to Norian (228.0 - 201.3 Ma)

• orig. assigned to Popo Agie Fm.

• group of beds-level stratigraphic resolution

Environment/lithology: fluvial-lacustrine; argillaceous siltstone and mudstone

• "fluvio-lacustrine paleoenvironment"
• "siltstone-mudstone beds"; "thinly bedded, clay draped, fine-grained fluvio-lacustrine siltstones which comprise thin (> 0.5 m) laterally impersistent beds in a predominantly fine clay-silt succession."

Size classes: macrofossils, mesofossils

Preservation: trace

Collected by M. Lockley, K. Conrad, M. Paquette in 1985

Collection methods: surface (in situ),

Primary reference: M. G. Lockley. 1986. A Guide to Dinosaur Tracksites of the Colorado Plateau and American Southwest. University of Colorado at Denver Geology Department Magazine, Special Issue 1:1-56 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 179080: authorized by Matthew Carrano, entered by Matthew Carrano on 27.05.2016

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Grallatoridae
"Agialopous sp." = Grallator, ? Anchisauripus sp.
"Agialopous sp." = Grallator Hitchcock 1858 theropod
? Anchisauripus sp. Lull 1904 theropod
 Phytosauria - Parasuchidae
? Apatopus sp.
? Apatopus sp. Baird 1957 archosaur
 Pseudosuchia - Gwyneddichniidae
Gwyneddichnium sp.
Gwyneddichnium sp. Bock 1952 archosaur
USGS D580/13, 16151; CU 165.6
 Eosuchia -
Lepidosauria indet.
Lepidosauria indet. lepidosaur
"probable lizard or sphenodontid"
 Squamata -
Rhynchosauroides sp.
Rhynchosauroides sp. Maidwell 1911 squamates
 Ichnofossils -
Pterichnus sp., Cochlichnus sp., ? Acanthichnus sp., Treptichnus sp., Scoyenia sp.
Pterichnus sp. Hitchcock 1865
Cochlichnus sp. Hitchcock 1858
? Acanthichnus sp. Hitchcock 1858
Treptichnus sp. Miller 1889
Scoyenia sp. White 1929