USGS #M3858 - Pittsburg Bluff Formation: Chattian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Lucinida - Lucinidae
Lucinoma columbiana (Clark and Arnold 1923)
Bivalvia - Solenida - Solenidae
Solen townsendensis (Clark 1925)
Solena (Eosolen) eugenensis (Clark 1925)
Bivalvia - Cardiida - Mactridae
Spisula (Mactromeris) pittsburgensis (Clark 1925)
Bivalvia - Cardiida - Ungulinidae
Felaniella (Felaniella) snavelyi Moore 1976
Bivalvia - Cardiida - Veneridae
Callista (Macrocallista) pittsburgensis (Dall 1900)
Bivalvia - Cardiida - Tellinidae
Tellina (Eurytellina) aduncanasa
Scaphopoda - Dentaliida - Dentaliidae
Dentalium (? Fissidentalium) laneensis Hickman 1969
Gastropoda - Naticidae
Neverita (Glossaulax) thomsonae Hickman 1969
Gastropoda - Neogastropoda - Fasciolariidae
Perse pittsburgensis Durham 1944
Gastropoda - Neogastropoda - Nassariidae
Molopophorus gabbi Dall 1909
Gastropoda - Neogastropoda - Siphonaliidae
Bruclarkia columbiana (Anderson and Martin 1914)
Gastropoda - Heterostropha - Architectonicidae
Architectonica blanda Dall 1909
Gastropoda - Heterostropha - Acteonidae
? Acteon sp. n. sp. Montfort 1810
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander stewarti Durham 1944
see common names

Geography
Country:United States State/province:Oregon County:Columbia
Coordinates: 45.8° North, 123.0° West (view map)
Paleocoordinates:45.5° North, 114.1° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Paleogene Epoch: Oligocene
Stage: Chattian 10 m.y. bin: Cenozoic 4
Key time interval: Chattian
Age range of interval: 27.82 - 23.03 m.y. ago
Stratigraphy
Formation:Pittsburg
Stratigraphic resolution:bed
Stratigraphy comments: Near top of Pittsburg Bluff 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,UMMP,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
Database number:37692
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-21 12:08:10 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-21 12:08:10
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]