Newport (Oligocene of the United States)

Where: Lincoln County, Oregon (44.7° N, 124.1° W: paleocoordinates 44.3° N, 113.2° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Alsea Formation, Rupelian (33.9 - 28.1 Ma)

• originally said to be from the Toledo Formation, an obsolete name for the Alsea; Date after Prothero et al., 2001.

•The referred specimen, USNM 256593, was originally reported to have come from the Toledo Formation [22, 23]. The Oligocene part of this formation has been re-designated as Alsea Formation [26], and dated to the early-mid Rupelian, spanning latest Chron C13r to the middle of Chron C12n (ca. 33.7–30.6 Ma [25, 27]). USNM 256593 was derived from the uppermost portion of the Alsea Formation [D. Bohaska 2013, pers. comm.], close to its contact with the overlying Yaquina Formation, which implies an age closer to Chron C12n (31.0–30.6 Ma). Marx & Fordyce 2015

• formation-level stratigraphic resolution

Environment/lithology: estuary or bay; siltstone

• active-margin estuary

Size class: macrofossils

Preservation: original phosphate

Reposited in the USNM

Primary reference: T. A. Deméré and A. Berta. 2008. Skull anatomy of the Oligocene toothed mysticete Aetiocetus weltoni (Mammalia; Cetacea): implications for mysticete evolution and functional anatomy. Zoological Journal of the Linnean Society 154:308-352 [M. Uhen/M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 84332: authorized by Mark Uhen, entered by Mark Uhen on 09.10.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Cetacea - Aetiocetidae
Aetiocetus cotylalveus Emlong 1966 whale