Also known as UO 2503, north of Seal Rock, UWBM C1024

Where: Lincoln County, Oregon (44.5° N, 124.1° W: paleocoordinates 44.2° N, 115.1° W)

• coordinate estimated from map

When: upper Member (Yaquina Formation), Chattian (28.1 - 23.0 Ma)

• The holotype of A. cotylalveus was found near the top of the formation [21], and is therefore likely early Chattian, or possibly latest Rupelian in age (minimum 28.0 Ma [22, 25]). (Marx & Fordyce, 2015)

• member-level stratigraphic resolution

Environment/lithology: marine; fine-grained, gray sandstone and siltstone

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Collection methods: surface (in situ),

Primary reference: D. Emlong. 1966. A new archaic cetacean from the Oligocene of Northwest Oregon. Bulletin of the Museum of Natural History, University of Oregon 3:1-51 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45782: authorized by Mark Uhen, entered by Mark Uhen on 01.12.2004

Creative Commons license: CC BY (attribution)