Where: San Mateo County, California (37.2° N, 122.4° W: paleocoordinates 43.5° N, 92.1° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Pigeon Point Formation, Middle Campanian (83.5 - 70.6 Ma)

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified sandstone

Size class: macrofossils

Preservation: mold/impression

Reposited in the USNM

Primary reference: W. P. Elder and L. R. Saul. 1993. Paleogeographic implications of molluscan assemblages in the Upper Cretaceous (Campanian) Pigeon Point Formation, California. In G. Dunn, K. McDougall (eds.), Mesozoic Paleogeography of the Western United States - II. Pacific Section SEPM Book 71:171-186 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 144773: authorized by Matthew Clapham, entered by Matthew Clapham on 17.05.2013

Creative Commons license: CC BY (attribution)