N.P. 254, Green Creek, Holcomb (Oligocene of the United States)

Where: Pacific County, Washington (46.6° N, 123.6° W: paleocoordinates 46.3° N, 112.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lincoln Creek Formation, Rupelian (33.9 - 28.1 Ma)

• "Probably from the Lincoln-Porter Horizon." Based on its location close to the base of the section in the Willapa Valley, the locality is perhaps early Oligocene.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; siltstone

• The molluscan fossils from this locality were regarded as being a “deep-water” assemblage by Hickman (1984), but estimates of water depth vary from approximately 20 to 100 m (Armentrout 1973), to more than 200 m (Hickman 1980). The section deepens upward and if this locality is near the cold-seep deposits it likely represents bathyal/slope depths.

Size class: macrofossils

Primary reference: H. G. Schenck. 1931. Cephalopods of the genus Aturia from western North America. University of California Publications, Bulletin of the Department of Geological Sciences 19:435-490 [M. Clapham/K. Okamoto/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 166390: authorized by Matthew Clapham, entered by Kristina Okamoto on 11.02.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautilida - Aturiidae
Aturia angustata
Aturia angustata Conrad 1849 nautiloid