Where: Contra Costa County, California (37.9° N, 121.9° W: paleocoordinates 42.4° N, 101.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Turritella infragranulata pachecoensis other zone, Selandian (61.6 - 59.2 Ma)

• Upper middle Paleocene (Selandian) = Turritella infragranulata pachecoensis Zone. “Martinez” Formation, lower member

Environment/lithology: marine; lithified sandstone

Size class: macrofossils

Collected by R.E. Dickerson in 1912; reposited in the UCMP

Primary reference: R. E. Dickerson. 1914. Fauna of the Martinez Eocene of California. Bulletin of the Department of Geology, University of California 6:61-180 [P. Holroyd/P. Holroyd/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 184016: authorized by Matthew Clapham, entered by Vanessa Maciel on 25.01.2017, edited by Patricia Holroyd, Austin Hendy and Jonathan Marcot

Creative Commons license: CC BY (attribution)