D 340kCO: Tulean, Nevada
collected by J. Ross, Jr.

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita - Asaphida - Asaphidae
? Presbynileus sp. Hintze 1954
? Trigonocerca sp. Ross 1951
Megistaspis?
see common names

Geography
Country:United States State/province:Nevada County:Eureka
Coordinates: 39.2° North, 116.3° West (view map)
Paleocoordinates:4.7° South, 84.3° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Ordovician Epoch:Early/Lower Ordovician
Key time interval:Tulean Trilobite zone: Protopliomerella contracta
Age range of interval:485.40000 - 471.80000 m.y. ago
Stratigraphy
Formation:Ninemile
Regional section:Antelope Valley Composite Regional bed:1554 ft
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Ibexian; G2?
Lithology and environment
Primary lithology: lithified "shale"
Lithology description: silty; calcareous; interbedded w/ledgy Ls
Environment:deep subtidal shelf Tectonic setting:passive margin
Geology comments: middle shelf
Taphonomy
Modes of preservation:body,replaced with silica
Size of fossils:macrofossils
Collection methods and comments
Collection methods:bulk,field collection
Reason for describing collection:biostratigraphic analysis
Collectors:J. Ross, Jr.
Metadata
Also known as:SF 612
Database number:104546
Authorizer:S. Finnegan Enterer:S. Finnegan
Modifier:P. Wagner Research group:marine invertebrate
Created:2011-02-07 12:04:21 Last modified:2012-08-31 16:27:09
Access level:the public Released:2011-02-07 12:04:21
Creative Commons license:CC BY
Reference information

Primary reference:

25411. R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner]