Where: Contra Costa County, California (37.9° N, 121.7° W: paleocoordinates 39.8° N, 105.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ypresian to Ypresian (56.0 - 41.3 Ma)

• A short distance above basal conglomerate.

•Putnick et al. (2001): the Domengine and Avenal Sandstones correlate with earliest middle Eocene Chron C21r (47.9-49.0 Ma). AGE: modified to Ypresian-Lutetian and "Domengine stage" following EPICC stratigraphy revision [Hendy, 6/2020].

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Primary reference: J. W. Durham. 1943. Pacific Coast Cretaceous and Tertiary corals. Journal of Paleontology 17(2):196-202 [W. Kiessling/W. Kiessling/W. Kiessling]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 36863: authorized by Wolfgang Kiessling, entered by Wolfgang Kiessling on 18.02.2004

Creative Commons license: CC BY (attribution)