USGS Mesozoic Loc. 28507 - Twin Creek Limestone: Late/Upper Bajocian, Idaho
collected by R. W. Imlay and Yaacov Nir 1961

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Cardiida - Cardiidae
Protocardia cf. schucherti
Bivalvia - Cardiida - Arcticidae
Pronoella sp. Fischer 1887
Bivalvia - Carditida - Astartidae
Astarte meeki Stanton 1899
Bivalvia - Ostreida - Gryphaeidae
Gryphaea planoconvexa Whitfield 1876
see common names

Geography
Country:United States State/province:Idaho County:Bonneville
Coordinates: 43.4° North, 111.8° West (view map)
Paleocoordinates:35.1° North, 51.3° West
Basis of coordinate:estimated from map
Time
Period:Jurassic Epoch:Middle Jurassic
Stage:Bajocian 10 m.y. bin:Jurassic 4
Key time interval:Late/Upper Bajocian
Age range of interval:168.60000 - 168.20000 m.y. ago
Stratigraphy
Formation:Twin Creek Limestone Member:Rich
Stratigraphy comments: Near middle of member and about 170-190ft above base of member.
Lithology and environment
Primary lithology:nodular "limestone"
Lithology description: Thin beds of nodular limestone.
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Museum repositories:USNM
Collectors:R. W. Imlay and Yaacov Nir Collection dates:1961
Metadata
Database number:167164
Authorizer:S. Holland Enterer:P. Monarrez
Created:2015-03-08 13:36:59 Last modified:2015-03-08 13:36:59
Access level:the public Released:2015-03-08 13:36:59
Creative Commons license:CC BY
Reference information

Primary reference:
54548. R. W. Imlay. 1967. Twin Creek Limestone (Jurassic) in the Western Interior of the United States. United States Geological Survey Professional Paper 540:1-105 [S. Holland/P. Monarrez]