USGS 17990, Grosebacher road: Early/Lower Campanian - Middle Campanian, Texas
collected by A.N. Sayre

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Echinoidea - Spatangoida - Schizasteridae
Proraster dalli (Clark 1891)
see common names

Geography
Country:United States State/province:Texas County:Bexar
Coordinates: 29.4° North, 98.7° West (view map)
Paleocoordinates:34.8° North, 72.0° West
Basis of coordinate:based on nearby landmark
Geographic resolution:small collection
Time
Period:Cretaceous Epoch:Late/Upper Cretaceous
Stage:Campanian 10 m.y. bin:Cretaceous 7
Key time interval:Early/Lower Campanian - Middle Campanian
Age range of interval:83.60000 - 72.10000 m.y. ago
Stratigraphy
Formation:Anacacho Limestone
Stratigraphic resolution:bed
Stratigraphy comments: Swezey and Sullivan (2004) correlate the Anacacho LS to the Baculites sp. (weak flank ribs), Baculites sp. (smooth) zone, which is late upper Campanian in Gradstein et al., 2004, through the Baculites maclearni zone, which is middle Campanian in Gradstein et al., 2004.
Lithology and environment
Primary lithology: "limestone"
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:A.N. Sayre
Metadata
Database number:197715
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2018-11-23 00:41:38 Last modified:2018-11-23 00:41:38
Access level:the public Released:2018-11-23 00:41:38
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]