Rock Creek/Sand Arroyo (AMNH) (Cretaceous of the United States)

Where: Garfield County, Montana (47.8° N, 106.3° W: paleocoordinates 54.5° N, 78.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Hell Creek Formation, Maastrichtian (72.1 - 66.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by B. Brown & P. Kaisen in 1908; reposited in the AMNH

Collection methods: quarrying, mechanical,

• sold to Birmingham City Museum and Art Gallery in 1958, now at Thinktank in Birmingham

Primary reference: Anonymous. 1958. Triceratops at home 80,000,000 years ago—and in Birmingham today. The Illustrated London News 232(6197):439 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 189572: authorized by Matthew Carrano, entered by Matthew Carrano on 31.10.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Neornithischia - Ceratopsidae
Triceratops prorsus Marsh 1890 ceratopsid
skull, AMNH 5028 - 1958G00003.00001