Also known as Arches National Park survey L-GFE-94-64
Where: Grand County, Utah (38.7° N, 109.7° W: paleocoordinates 34.9° N, 56.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Brushy Basin Member (Morrison Formation), Kimmeridgian to Kimmeridgian (157.3 - 145.0 Ma)
• "The tracks occur at or near the top of the lower Brushy Basin Member in the uppermost of the most prominent sandstone layers within this unit."
• bed-level stratigraphic resolution
Environment/lithology: "channel"; bioturbated sandstone and mudstone
Size class: macrofossils
Preservation: cast, trace
Collected by G. Engelmann
Primary reference: G. F. Engelmann and S. T. Hasiotis. 1999. Deep dinosaur tracks in the Morrison Formation; sole marks that are really sole marks. Utah Geological Survey Miscellaneous Publication 99-1:179-183 [J. Alroy/R. Whatley/M. Carrano]more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 13275: authorized by John Alroy, entered by Robin Whatley on 12.02.2002, edited by Matthew Carrano
Creative Commons license: CC BY (attribution)
Taxonomic list
Reptilia | |
? Theropoda indet. Marsh 1881 theropod | |
Sauropoda indet. Marsh 1878 sauropod |