USGS #15537 - Pittsburg Bluff Formation: Chattian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Carditida - Carditidae
Cyclocardia (Cyclocardia) cf. hannibali (Clark 1925)
recombined as Cyclocardia hannibali
Bivalvia - Cardiida - Cardiidae
Nemocardium (Keenae) lorenzanum (Arnold 1908)
recombined as Nemocardium (Nemocardium) lorenzanum
Bivalvia - Cardiida - Ungulinidae
Felaniella (Felaniella) snavelyi Moore 1976
Bivalvia - Cardiida - Veneridae
Pitar (Pitar) dalli (Weaver 1916)
Callista (Macrocallista) pittsburgensis (Dall 1900)
original and current combination Meretrix pittsburgensis
Bivalvia - Cardiida - Mactridae
Spisula (? Mactromeris) veneriformis
original and current combination Mactromeris
Bivalvia - Solenida - Solenidae
Solen townsendensis (Clark 1925)
Solena (Eosolen) eugenensis (Clark 1925)
Bivalvia - Nuculanida - Nuculanidae
Litorhadia washingtonensis (Weaver 1916)
recombined as Nuculana (Saccella) washingtonensis
Gastropoda - Opisthobranchia - Cylichnidae
Scaphander stewarti Durham 1944
Gastropoda - Heterostropha - Acteonidae
Acteon chehalisensis (Weaver 1916)
Gastropoda - Turritellidae
Turritella pittsburgensis Moore 1976
Gastropoda - Neogastropoda - Siphonaliidae
Eosiphonalia oregonensis (Dall 1909)
Gastropoda - Neogastropoda - Fasciolariidae
Perse pittsburgensis 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, 114.0° 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:27.82000 - 23.03000 m.y. ago
Stratigraphy
Formation:Pittsburg Bluff
Stratigraphic resolution:bed
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:"cross stratification",fine,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:offshore 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:USGS
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 15537
Database number:37680
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2004-03-20 16:26:31 Last modified:2013-11-25 13:37:23
Access level:the public Released:2004-03-20 16:26:31
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]