mouth of Birch Creek (Cretaceous of the United States)

Also known as Dog Creek

Where: Chouteau County, Montana (47.7° N, 109.6° W: paleocoordinates 54.8° N, 75.8° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Judith River Formation (Montana Group), Middle Campanian (83.5 - 70.6 Ma)

• near base of JRF

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandstone

• "sandstone"

Size classes: macrofossils, mesofossils

Collected by E. D. Cope in 1876; reposited in the AMNH

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

Primary reference: E. D. Cope. 1876. Descriptions of some vertebrate remains from the Fort Union Beds of Montana. Proceedings of the Academy of Natural Sciences of Philadelphia 28:248-261 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 46121: authorized by Matthew Carrano, entered by Matthew Carrano on 04.01.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Ornithischia - Ceratopsidae
Monoclonius crassus n. gen. n. sp.
Monoclonius crassus n. gen. n. sp. Cope 1876 ceratopsid
AMNH 3998, 3997