USGS 2546-CO: Steptoean, Nevada
collected by A. R. Palmer 1960

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Ptychopariida - Elviniidae
Dunderbergia bigranulosa Palmer 1960
Trilobita - Olenida - Pterocephaliidae
Sigmocheilus ? notha
see common names

Geography
Country:United States State/province:Nevada County:White Pine
Coordinates: 40.0° North, 114.9° West (view map)
Paleocoordinates:4.0° South, 87.4° West
Basis of coordinate:unpublished field data
Geographic resolution:outcrop
Time
Period: Cambrian Epoch: Furongian
10 m.y. bin: Cambrian 5
Key time interval: Steptoean Trilobite zone:  Dunderbergia
Age range of interval: 497 - 493 m.y. ago
Stratigraphy
Formation:Dunderberg Shale
Stratigraphic resolution:bed
Lithology and environment
Primary lithology: lithified silty "limestone"
Secondary lithology: lithified siltstone
Lithology description: Interbedded siltstone and silty limestone
Environment:carbonate indet. Tectonic setting:passive margin
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection excludes:some macrofossils
Collection methods:mechanical,field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:USGS,USNM
Collectors:A. R. Palmer Collection dates:1960s
Metadata
Database number:110621
Authorizer:M. Hopkins Enterer:M. Hopkins
Research group:marine invertebrate
Created:2011-06-11 06:15:49 Last modified:2011-06-10 16:15:49
Access level:the public Released:2011-06-11 06:15:49
Creative Commons license:CC BY
Reference information

Primary reference:
36349. A. R. Palmer. 1965. Trilobites of the Late Cambrian Pterocephaliid Biomere in the Great Basin, United States. United States Geological Survey Professional Paper 493:1-105 [M. Hopkins/M. Hopkins]