1963-1966 Clayball Hill (Cretaceous of the United States)

Where: Chouteau County, Montana (47.8° N, 109.6° W: paleocoordinates 54.9° N, 75.7° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Coal Ridge Member (Judith River Formation), Late/Upper Campanian (83.5 - 70.6 Ma)

• 40 feet below top of formation, 100 feet below basal Bearpaw Shale oyster bed; Judithian based on fauna; prob. Coal Ridge Mbr.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray, yellow siltstone

• "buff to gray, fairly homogeneous siltstone"

Size class: mesofossils

Reposited in the AMNH

Collection methods: bulk, sieve,

Primary reference: A. Sahni. 1972. The vertebrate fauna of the Judith River Formation, Montana. Bulletin of the American Museum of Natural History 147(6):321-412 [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 14447: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matthew Carrano and Roger Benson

Creative Commons license: CC BY (attribution)

Taxonomic list

• "less than 1 per cent of the mammal fossils obtained from the Judith River Formation"
Show authors, comments, and common names
Mammalia
 Multituberculata - Cimolomyidae
Cimolomys clarki n. sp.
Cimolomys clarki n. sp. Sahni 1972 multituberculate
Reptilia
 Squamata - Teiidae
Teiidae indet.
Teiidae indet. Gray 1827 squamates
AMNH 8486