Where: New Mexico (36.8° N, 104.9° W: paleocoordinates 42.9° N, 84.1° W)

• coordinate estimated from map

When: Nacimiento Formation, Puercan to Puercan (66.0 - 60.9 Ma)

• about 1000 feet above the base of the upper coal formation. It is not specified what formation this collection comes from, it is likely the Nacimiento Fm. Brown originally called this the Nacimiento Group and the Puerco Fm.

Environment/lithology: fluvial; claystone and sandstone

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying, mechanical,

• Collected in 1910, with W.T. Lee in charge.

Primary reference: R. W. Brown. 1962. Paleocene flora of the Rocky Mountains and Great Plains. United States Geological Survey Professional Paper 375:1-119 [P. Wilf/J. Sessa/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52936: authorized by Peter Wilf, entered by Jocelyn Sessa on 28.08.2005

Creative Commons license: CC BY (attribution)