Where: Washington County, Oregon (45.6° N, 123.2° W: paleocoordinates 45.3° 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 37684: authorized by Austin Hendy, entered by Austin Hendy on 20.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Turritella pittsburgensis Moore 1976 turret shell | |
Perse pittsburgensis Durham 1944 snail | |
Aforia campbelli Durham 1944 aforia | |
Bivalvia | |
"Litorhadia washingtonensis" = Nuculana (Saccella) washingtonensis
"Litorhadia washingtonensis" = Nuculana (Saccella) washingtonensis Weaver 1916 pointed nut clam | |
? Tellina pittsburgensis Clark 1925 tellin clam | |
Pitar (Pitar) cf. dalli, "Callista (Macrocallista) pittsburgensis" = Macrocallista pittsburgensis
Pitar (Pitar) cf. dalli Weaver 1916 venus clam
"Callista (Macrocallista) pittsburgensis" = Macrocallista pittsburgensis Dall 1900 venus clam | |
Solena (Eosolen) eugenensis Clark 1925 clam | |
Panopea ramonensis Clark 1925 clam | |
"Thracia (Thracia) condoni" = Thracia (Cetothrax) condoni
"Thracia (Thracia) condoni" = Thracia (Cetothrax) condoni Dall 1909 clam | |
Cochlodesma bainbridgensis Clark 1925 clam |