Where: Butte County, California (39.7° N, 121.6° W: paleocoordinates 46.9° N, 89.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Chico Formation (Asuncion Group), Campanian (83.6 - 72.1 Ma)

• The Chico Formation only has a thickness of a few hundred feet here, and is not regarded as representing the span exposed on Chico Creek. Contains similar faunas to the middle Chico Creek section (Santonian); Campanian according to Matsumoto (1960).

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by Hanna et al.; reposited in the CAS

Collection methods: surface (in situ),

• Initially listed by Gabb (1864), but amende with further collecting by Hanna, Bennison, and Anderson. Taxonomy presumably updated by Anderson.

Primary reference: F. M. Anderson. 1958. Upper Cretaceous of the Pacific Coast. Geological Society of America Memoir 71:1-378 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 44274: authorized by Austin Hendy, entered by Austin Hendy on 08.09.2004, edited by Jonathan Marcot and Matthew Clapham

Creative Commons license: CC BY (attribution)