Baker Point (M3878): Rupelian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Naticidae
Neverita (Glossaulax) thomsonae Hickman 1969
synonym of Glossaulax reclusiana
Cryptonatica pittsburgensis Moore 1976
synonym of Polinices washingtonensis
Polinices washingtonensis (Weaver 1916)
Gastropoda - Neogastropoda - Drilliidae
Suavodrillia winlockensis (Effinger 1938)
Gastropoda - Neogastropoda - Turridae
Spirotropis kincaidi (Weaver 1916)
recombined as Parasyrinx kincaidi
Gastropoda - Neogastropoda - Fasciolariidae
Perse pittsburgensis Durham 1944
Gastropoda - Neogastropoda - Siphonaliidae
Bruclarkia columbiana (Anderson and Martin 1914)
Gastropoda - Neogastropoda - Nassariidae
Molopophorus gabbi Dall 1909
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander stewarti Durham 1944
Bivalvia - Solenida - Solenidae
Solena (Eosolen) cf. eugenensis (Clark 1925)
Bivalvia - Cardiida - Tellinidae
? Tellina cf. pittsburgensis Clark 1925
Bivalvia - Cardiida - Veneridae
Callista (Macrocallista) pittsburgensis (Dall 1900)
original and current combination Meretrix pittsburgensis
Bivalvia - Cardiida - Mactridae
Spisula (Mactromeris) pittsburgensis (Clark 1925)
recombined as Mactromeris pittsburgensis
Bivalvia - Nuculanida - Nuculanidae
Litorhadia washingtonensis (Weaver 1916)
recombined as Nuculana (Saccella) washingtonensis
Bivalvia - Nuculida - Nuculidae
Acila (Truncacila) shumardi (Dall 1909)
see common names

Geography
Country:United States State/province:Oregon County:Columbia
Coordinates: 45.9° North, 123.1° West (view map)
Paleocoordinates:45.6° North, 112.3° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Paleogene Epoch:Oligocene
Stage:Rupelian 10 m.y. bin:Cenozoic 4
Key time interval:Rupelian
Age range of interval:33.90000 - 27.82000 m.y. ago
Stratigraphy
Formation:Pittsburg
Stratigraphic resolution:bed
Stratigraphy comments: Middle of formation. 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.
Lithology and environment
Primary lithology:"cross stratification",concretionary,gray poorly lithified sandstone
Includes fossils?Y
Lithology description: Massive olive-gray fine-grained sandstone, with concretions, trough shaped prisms, silstone rip-up clasts.
Environment:coastal indet. Tectonic setting:forearc basin
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Temporal resolution:time-averaged
Spatial resolution:allochthonous
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:CAS,UCMP,UW
Collection method comments: 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)
Taxonomic list comments:Very complete for mollusca
Metadata
Also known as:USGS M3878
Database number:37701
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-21 14:33:02 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-21 14:33:02
Creative Commons license:CC BY
Reference information

Primary reference:
10064. 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]