Black Ridge Trail I tracksite (Jurassic of the United States)

Also known as Colorado National Monument

Where: Mesa County, Colorado (39.1° N, 108.7° W: paleocoordinates 34.5° N, 54.3° W)

• small collection-level geographic resolution

When: Salt Wash Member (Morrison Formation), Kimmeridgian (157.3 - 152.1 Ma)

• near top of member

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; medium-grained sandstone and brown, green claystone

• "a 4 m-thick, medium grained, trough and planar bedded sandstone bed. The claystone into which the track was made is light green in the upper 10-15 cm and bright reddish brown below with mottling between the two."

Size class: macrofossils

Preservation: cast, trace

Collection methods: surface (in situ),

Primary reference: J. R. Foster and M. G. Lockley. 2006. The vertebrate ichnological record of the Morrison Formation (Upper Jurassic, North America). In J. R. Foster, S. G. Lucas (eds.), Paleontology and Geology of the Upper Jurassic Morrison Formation. New Mexico Museum of Natural History and Science Bulletin 36:203-216 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 192756: authorized by Matthew Carrano, entered by Matthew Carrano on 18.04.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Saurischia -
Sauropoda indet.
Sauropoda indet. Marsh 1878 sauropod