ammonites
Billy Creek 1 (Cretaceous of the United States)

Also known as UCMP V-72211

Where: Garfield County, Montana (47.6° N, 107.3° W: paleocoordinates 54.5° N, 80.4° W)

• coordinate based on unpublished field data

• small collection-level geographic resolution

When: Hell Creek Formation, Lancian (70.6 - 65.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: coarse channel fill; sandstone

Size classes: macrofossils, mesofossils

Reposited in the UCMP

Collection methods: bulk, surface (float), sieve,

Primary reference: J. D. Archibald. 1982. A study of Mammalia and geology across the Cretaceous-Tertiary boundary in Garfield County, Montana. University of California Publications in Geological Sciences 122:1-286 [J. Alroy/J. Alroy/M. Carrano] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14512: authorized by John Alroy, entered by John Alroy on 15.05.2002, edited by Matt Carrano

Creative Commons license: CC BY-NC-ND (attribution-noncommercial-no derivatives)