Also known as Colorado National Monument
Where: Mesa County, Colorado (39.1° N, 108.8° W: paleocoordinates 34.8° N, 55.0° W)
• coordinate based on nearby landmark
• small collection-level geographic resolution
When: Salt Wash Member (Morrison Formation), Late/Upper Jurassic (161.2 - 145.5 Ma)
• Tracks occur within the middle shaly unit of the Salt Wash Member.
• group of beds-level stratigraphic resolution
Environment/lithology: "channel"; sandstone and mudstone
Size class: macrofossils
Preservation: cast, trace
Collection methods: surface (float),
• This particular site is one of three within the middle shaly unit of the Salt Wash Member. The largest infilled track structure is greater than 1 meter across and greater than 1 meter deep.
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/R. Whatley] more details
Purpose of describing collection: taphonomic analysis
PaleoDB collection 13277: authorized by John Alroy, entered by Robin Whatley on 12.02.2002, edited by Margaret Shalap
Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)