Cherty Shale Member, Phosphoria Formation of Montana: Permian, Montana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Bellerophontida - Bellerophontidae
Knightites (Retispira) sp. (Knight 1945)
Bivalvia - Pholadomyida - Edmondiidae
Edmondia stuchburia
Bivalvia - Nuculida - Nuculidae
Nuculopsis sp. Girty 1912
unclassified
Porifera indet. Grant 1836
see common names

Geography
Country:United States State/province:Montana
Coordinates: 47.1° North, 109.4° West (view map)
Paleocoordinates:17.6° North, 28.1° West
Basis of coordinate:based on political unit
Geographic resolution:basin
Time
Period: Permian
10 m.y. bin: Permian 1-4
Key time interval: Permian
Age range of interval: 298.9 - 251.902 m.y. ago
Stratigraphy
Formation:Phosphoria Member:Cherty Shale
Stratigraphic resolution:member
Lithology and environment
Primary lithology: cherty/siliceous "shale"
Includes fossils?Y
Environment:marine indet.
Taphonomy
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:11274
Authorizer:A. Miller Enterer:C. Ferguson
Modifier:C. Ferguson Research group:marine invertebrate
Created:2001-07-30 10:33:11 Last modified:2004-03-13 22:45:03
Access level:the public Released:2001-07-30 10:33:11
Creative Commons license:CC BY
Reference information

Primary reference:
4145.1% 17920E. L. Yochelson and D. H. Van Sickle. 1968. Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations; Geology of Permian Rocks in the Western Phosphate Field. United States Geological Survey Professional Paper 313(D):572-660 [A. Miller/C. Ferguson/P. Wagner]