UCMP A64, Willapa River at Big Bend (Oligocene of the United States)

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

• Paleocoordinates: 51.6° N, 106.6° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lincoln Creek Formation, Rupelian (33.9 - 27.3 Ma)

• "Keasey equivalent" beds, likely the Lincoln Creek Formation. Given the location, it is probably from the lower part of the stratigraphy and of early Oligocene (or perhaps late Eocene) age.

• group of beds-level stratigraphic resolution

Environment/lithology: deep-water; lithified shale

• 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

Collected by J. Wyatt Durham; reposited in the UCMP

Primary reference: A. K. Miller and H. R. Downs. 1950. Tertiary nautiloids of the Americas: supplement. Journal of Paleontology 24:1-18 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 180416: authorized by Matthew Clapham, entered by Matthew Clapham on 16.07.2016

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautilida - Aturiidae
Aturia cf. grandior
Aturia cf. grandior Schenck 1931