USGS 9604, Wallerville: Late/Upper Maastrichtian, Mississippi
collected by L.W. Stephenson, B. Wade

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Spatangoida - Schizasteridae
Linthia variabilis Slocom 1909
Echinoidea - Spatangoida - Micrasteridae
Micraster americanus (Stephenson 1941)
see common names

Geography
Country:United States State/province:Mississippi County:Union
Coordinates: 34.4° North, 88.9° West (view map)
Paleocoordinates:38.0° North, 66.3° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Maastrichtian 10 m.y. bin:Cretaceous 8
Key time interval:Late/Upper Maastrichtian
Age range of interval:72.10000 - 66.00000 m.y. ago
Stratigraphy
Formation:Prairie Bluff Chalk
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: chalk
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:good
Collection methods and comments
Collection methods:survey of museum collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:L.W. Stephenson, B. Wade
Metadata
Database number:78195
Authorizer:W. Kiessling Enterer:U. Merkel
Modifier:M. Clapham Research group:marine invertebrate
Created:2008-01-31 00:25:34 Last modified:2018-11-17 20:58:16
Access level:the public Released:2008-01-31 00:25:34
Creative Commons license:CC BY
Reference information

Primary reference:
26335.1% 20600C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]