Also known as Colorado National Monument

Where: Mesa County, Colorado (39.1° N, 108.7° W: paleocoordinates 34.0° N, 53.9° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Tidwell Member (Morrison Formation), Oxfordian to Oxfordian (163.5 - 152.1 Ma)

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Preservation: trace

Collected by COLM/MWC in 2010–2011

Collection methods: surface (float),

Primary reference: J. S. Tweet, V. L. Santucci, T. Connors and J. P. Kenworthy. 2012. Paleontological Resource Inventory and Monitoring: Northern Colorado Plateau Network. National Park Service Technical Report NPS/NCPN/NRTR—2012/585 xii-524 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 225134: authorized by Matthew Carrano, entered by Matthew Carrano on 26.04.2022

Creative Commons license: CC BY (attribution)