Also known as UCMP V-72210; LACM 3103

Where: Garfield County, Montana (47.6° N, 107.0° W: paleocoordinates 54.0° N, 81.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Tullock Formation, Puercan (66.0 - 63.3 Ma)

• from the Billy Creek section and definitely in chron C29r: see Archibald et al. 1982, Swisher et al. 1993; the IrZ-Coal is apparently present in the section, although the HFZ-Coal is not, so the date of the IrZ-Coal can be considered a maximum

• group of beds-level stratigraphic resolution

Environment/lithology: coarse channel fill; sandstone

Size class: mesofossils

Reposited in the LACM

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: general faunal/floral analysis

PaleoDB collection 14761: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Philip Mannion and Patricia Holroyd

Creative Commons license: CC BY (attribution)