Also known as SU 3221, UCMP A4753

Where: Polk County, Oregon (44.9° N, 123.4° W: paleocoordinates 47.1° N, 107.5° W)

• coordinate stated in text

When: Siletz River Volcanics Formation, Eocene (56.0 - 33.9 Ma)

• Baldwin (1947, 1964) identifies the sedimentary beds at the Ellendale Basalt Quarry as interbeds in the upper part of the Siletz River volcanics. Durham (in

•Baldwin, 1947, p. 10,11) reports a megafauna from these beds indicating an early Eocene ("Capay") age, slightly older than the early middle Eocene age beds containing P. (Entemnotrochus?) schencki n. sp.

Environment/lithology: marine; calcareous lithology not reported

Size class: macrofossils

Collected by L. Lambert, E. M. Baldwin

Primary reference: C.S. Hickman. 1976. Pleurotomaria (Archaeogastropoda) in the Eocene of the northeastern Pacific: a review of Cenozoic biogeography and ecology of the genus. Journal of Paleontology 50(6):1090-1102 [P. Holroyd/E. Orzechowski/E. Orzechowski]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 194800: authorized by Patricia Holroyd, entered by Susan Tremblay on 29.06.2018

Creative Commons license: CC BY (attribution)