Also known as LACM 5930

Where: Clallam County, Washington (48.2° N, 124.0° W: paleocoordinates 47.9° N, 115.4° W)

• coordinate estimated from map

When: Pysht Formation (Twin River Group), Chattian (28.1 - 23.0 Ma)

• latest Oligocene

•

•early Chattian (28.1–26.5 Ma). Samples of the Pysht Formation from either side of Twin Rivers correlate with Chrons C9r–C8r (28.1–26.5 Ma) [106]. (Marx & Fordyce, 2015)

• formation-level stratigraphic resolution

Environment/lithology: basinal (siliceous); concretionary mudstone

Size class: macrofossils

Preservation: original phosphate

Reposited in the LACM

Collection methods: surface (in situ),

Primary reference: L. G. Barnes, M. Kimura, H. Furusawa and H. Sawamura. 1995. Classification and distribution of Oligocene Aetiocetidae (Mammalia; Cetacea; Mysticeti) from western North America and Japan. The Island Arc 3(4):392-431 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 45784: authorized by Mark Uhen, entered by Mark Uhen on 01.12.2004, edited by Carlos Peredo

Creative Commons license: CC BY (attribution)