Where: Contra Costa County, California (37.9° N, 121.8° W: paleocoordinates 44.0° N, 97.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Moreno Formation, Maastrichtian (72.1 - 66.0 Ma)

• "The horizon of the present species is Maestrichtian."

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Reposited in the CAS

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: general faunal/floral analysis

PaleoDB collection 225034: authorized by Jonathan Marcot, entered by Jonathan Marcot on 20.04.2022

Creative Commons license: CC BY (attribution)