Where: Uintah County, Utah (40.4° N, 109.3° W: paleocoordinates 37.0° N, 56.3° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Brushy Basin Member (Morrison Formation), Middle Tithonian (150.8 - 145.5 Ma)

• 10 m above the quarry sandstone interval and 26 m below the top of the Brushy Basin Member within an interval that consists of mudstone with numerous thin bentonite beds.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; volcaniclastic, gray, green mudstone

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Collected by S. K. Madsen in 1991

Collection methods: quarrying, surface (in situ), mechanical,

• Discovered by Scott K. Madsen on 16 September 1991

Primary reference: D. J. Chure, C. E. Turner, and F. Peterson. 1992. An embryo of the ornithopod dinosaur Camptosaurus from the Morrison Formation (Upper Jurassic) of Dinosaur National Monument, Utah. Journal of Vertebrate Paleontology 12(3, suppl.):23A [M. Carrano/M. Carrano/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52110: authorized by Matt Carrano, entered by Kaitlin Maguire on 22.07.2005