Where: Butte County, California (39.9° N, 121.7° W: paleocoordinates 45.9° N, 87.2° W)

• coordinate estimated from map

When: Chico Formation, Late/Upper Cretaceous (100.5 - 66.0 Ma)

Environment/lithology: marine; gray, blue sandstone and carbonaceous shale

Size class: macrofossils

Collected by Taff, Hanna, and Cross in 1934; reposited in the CAS

Primary reference: J. A. Taff, G. D. Hanna, and C. M. Cross. 1940. Type locality of the Cretaceous Chico formation. Geological Society America Bulletin 51(9):1131-1328 [J. Marcot/J. Marcot]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 215428: authorized by Jonathan Marcot, entered by Jonathan Marcot on 10.11.2020

Creative Commons license: CC BY (attribution)