Where: Washington County, Oregon (45.8° N, 123.1° W: paleocoordinates 45.4° N, 114.2° W)

• coordinate based on nearby landmark

When: Chattian (28.1 - 23.0 Ma)

• age after Nesbitt 2018

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: H. L. Clark. 1937. A new sea-urchin from the "Oligocene" of Oregon. Transactions of the San Diego Society of Natural History 8(28):367-374 [M. Uhen/B. Shipps/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 203135: authorized by Mark Uhen, entered by Mark Uhen on 01.08.2019

Creative Commons license: CC BY (attribution)