Also known as USGS 15530
Where: Columbia County, Oregon (45.9° N, 123.1° W: paleocoordinates 45.5° N, 114.2° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Pittsburg Bluff Formation, Chattian (28.1 - 23.0 Ma)
• Upper part of Pittsburg Fm. The Pittsburg Bluff Formation conformably overlies the Keasey Formation (late Eocene and early Oligocene) and is conformably overlain by the Scappose Formation (late Oligocene and early Miocene). Parts of the formation are lithologically similar and therefore the stratigraphic position of exposures are sometimes uncertain. The estimated thickness for the entire formation is 200 ml the thickest continuous section of the formation is 100 m thick.
• bed-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, fine-grained, concretionary, gray sandstone
Size class: macrofossils
Reposited in the USGS
Collection methods: quarrying,
• Material housed in the USGS, Menlo Park. Also collections from UCMP, CAS, Stanford University (SU), University of Washington (UW), University of Oregon (UO), and the Academy of Natural Sciences of Philadelphia (ANSP)
Primary reference: E. J. Moore. 1976. Oligocene marine mollusks from the Pittsburg Bluff Formation in Oregon. United States Geological Survey Professional Paper 922:1-66 [A. Miller/A. Hendy/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 37681: authorized by Austin Hendy, entered by Austin Hendy on 20.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Scaphopoda | |
Dentalium (? Fissidentalium) laneensis Hickman 1969 tusk shell | |
Bivalvia | |
Litorhadia washingtoni pointed nut clam | |
Acila (Truncacila) shumardi Dall 1909 divaricate nutclam | |
? Tellina pittsburgensis Clark 1925 tellin clam | |
"Nemocardium (Keenae) lorenzanum" = Anechinocardium lorenzanum
"Nemocardium (Keenae) lorenzanum" = Anechinocardium lorenzanum Arnold 1908 cockle | |
"Callista (Macrocallista) pittsburgensis" = Macrocallista pittsburgensis
"Callista (Macrocallista) pittsburgensis" = Macrocallista pittsburgensis Dall 1900 venus clam | |
Gastropoda | |
Suavodrillia winlockensis Effinger 1938 snail | |
Turritella pittsburgensis Moore 1976 turret shell |