NWM Loc. C501 - Mist [Keasey Fm] (Eocene of the United States)

Where: Columbia County, Oregon (46.0° N, 123.3° W: paleocoordinates 46.3° N, 111.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Middle Member (Keasey Formation), Priabonian (38.0 - 33.9 Ma)

• LITHOSTRATIGRAPHY: The Keasey Fm overlies the late Eocene Cowlitz Fm, and underlies the Pittsburg Bluff Fm, and is subdivided into three informal members. STRATIGRAPHIC POSITION: In the upper part of the middle member of the Keasey Fm.

• bed-level stratigraphic resolution

Environment/lithology: deep-water; micaceous, gray siltstone and mudstone

• No general geologic data provided
• Dark gray, highly micaceous, laminated siltstone and interbedded mudstone

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTOR: P. Kirkland. REPOSITORY: Northwest Museum of Natural History (NWM), Portland, Oregon.

Primary reference: B. J. Welton. 2013. A new archaic basking shark (Lamniformes, Cetorhinidae) from the Late Eocene of Western Oregon, USA, and description of the dentition, gill rakers and vertebrae of the recent basking shark Cetorhinus Maximus (Gunnerus). New Mexico Museum of Natural History and Science Bulletin 58:1-48 [A. Hendy/A. Hendy/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 161921: authorized by Austin Hendy, entered by Austin Hendy on 15.09.2014, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to chondrichthyans NOMENCLATURE: Authoritative publication, with modern nomenclature, and species-resolution identifications.
Chondrichthyes
 Squatiniformes - Squatinidae
Squatina sp. Dumeril 1806 angel shark
 Squaliformes - Centrophoridae
Centrophorus sp. Müller and Henle 1837 gulper shark
 Lamniformes - Odontaspididae
Odontaspis sp. Agassiz 1838 sand tiger shark
 Lamniformes - Cetorhinidae
Keasius taylori Welton 2013 basking shark
 Hexanchiformes - Hexanchidae
Heptranchias sp. Rafinesque 1810 sevengill shark
Notorhynchus sp. Ayres 1855 sevengill shark