Also known as USGS 25026, UCMP IP7983
Where: Columbia County, Oregon (45.8° N, 123.3° W: paleocoordinates 46.1° N, 111.0° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Lower Member (Keasey Formation), Priabonian (38.0 - 33.9 Ma)
• Lower member consists of 0-150 m of dark gray, highly micaceous, laminated siltstone and interbedded mudsone. Glaucontitc layers are not uncommon. The Keasey Formation consists of a maximum of 700 m of gray tuffaceous marine siltstone and massive mudstone discontinuously exposed in quaries, road and railway cuts, and along major drainages. The Keasey Fm overlies the late Eocene Cowlitz Fm, and underlies the Pittsburg Bluff Fm. Fm is subdivided into three informal members.
• bed-level stratigraphic resolution
Environment/lithology: deep-water; micaceous, gray siltstone and mudstone
Size class: macrofossils
Reposited in the USNM
Collection methods: quarrying,
• USGS collections are reposited in USNM. Other collections are reposited at Stanford University (SU), UC Berkeley Museum of Paleontology (UCMP), Cal. Acad. Sci. (CAS), Oregon State Dept. of Geology and Mineral Industries (DOGAMI)
Primary reference: C. S. Hickman. 1980. Paleogene Marine Gastropods of the Keasey Formation in Oregon. Bulletins of American Paleontology 78(310):1-112 [L. Ivany/E. Kowalski/M. Uhen]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 39951: authorized by Austin Hendy, entered by Austin Hendy on 12.06.2004, edited by Mark Uhen
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Bathybembix columbiana Dall 1909 snail | |
Scaphander impunctatus Hickman 1980 snail | |
Polinices (? Euspira) clementensis Hanna 1927 moon snail | |
Sveltella keaseyensis n. sp. snail
Bonellitia (Admetula) tumida Hickman 1980 snail | |
Conus weltoni Hickman 1980 cone shell | |
Turrinosyrinx nodilifera n. sp.1, Gemmula rockcreekensis1, Procerapex bentsonae1, Acamptogenotia (Acamptogenotia) tessellata1
| |
Conomitra vernoniana Hickman 1980 ribbed mitre | |
Granula profundorum n. sp.
Granula profundorum n. sp. Hickman 1980 margin shell | |
Echinophoria dalli Dickerson 1917 snail | |
Bivalvia | |
| |
Pandora eocapsella n. sp.2
| |
Cardiomya pavascotti n. sp.2
| |
"Aperiploma bainbridgensis" = Cochlodesma bainbridgensis2
|