Where: San Francisco County, California (37.8° N, 122.5° W: paleocoordinates 36.7° N, 77.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Albian (113.0 - 100.5 Ma)

• Albian age based on ammonite Douvilleiceras

• bed-level stratigraphic resolution

Environment/lithology: submarine fan; lithified sandstone

Size class: macrofossils

Preservation: mold/impression

Collected by George Topham, Richard Sessions in 1950

Primary reference: J. Schlocker, M. G. Bonilla, and R. W. Imlay. 1954. Ammonite indicates Cretaceous age for part of Franciscan Group in San Francisco bay area, California. Bulletin of the American Association of Petroleum Geologists 38:2372-2381 [M. Clapham/M. Clapham]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 185240: authorized by Matthew Clapham, entered by Matthew Clapham on 17.04.2017

Creative Commons license: CC BY (attribution)