Also known as USGS 25032
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: Upper Member (Keasey Formation), Priabonian (38.0 - 33.9 Ma)
• Upper member consists of 50 m of alternating light to dark tuffaceous siltstone and mudstone characterized by numerous well-indurated calcaerous beds and concretionary siltstone layers. 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; poorly lithified, concretionary, tuffaceous, gray, calcareous siltstone and concretionary, tuffaceous, gray, calcareous mudstone
Size class: macrofossils
Preservation: concretion
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)Exhaustive for gastropoda
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 40204: authorized by Austin Hendy, entered by Austin Hendy on 19.06.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Bathybembix nitor n. sp.
Bathybembix nitor n. sp. Hickman 1980 snail | |
Turritella keaseyense turret shell | |
Epitonium (Boreoscala) schencki wentletrap | |
Polinices (? Euspira) clementensis Hanna 1927 moon snail
Polinices (Euspira) nuciformis Gabb 1864 moon snail
Natica (Natica) weaveri Tegland 1933 moon snail | |
Perse aff. pittsburgensis Durham 1944 snail | |
Trophonopsis platacantha Hickman 1980 true whelk | |
Turricula keaseyensis Hickman 1976 snail | |
Ptychosyrinx facula Hickman 1976 turrid
Acamptogenotia (Acamptogenotia) tessellata Hickman 1976 turrid | |
Comitas (Boreocomitas) oregonensis Hickman 1976 snail | |
Conomitra vernoniana Hickman 1980 ribbed mitre | |
Echinophoria dalli Dickerson 1917 snail | |
Argobuccinum jeffersonense triton shell |