D1684 CO: Blackhillsian, Nevada
collected by J. Ross, Jr.

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Orthida - Finkelnburgiidae
Diparelasma sp. Ulrich and Cooper 1936
Trilobita - Asaphida - Asaphidae
Trigonocerca typica Ross 1951
? Isoteloides sp. Raymond 1910
Trilobita - Proetida - Hystricuridae
Psalikilus pikum Hintze 1953
Trilobita - Proetida - Bathyuridae
? Bolbocephalus sp. Whitfield 1890
Trilobita - Odontopleurida - Odontopleuridae
? Diacanthaspis sp. Whittington 1941
see common names

Geography
Country:United States State/province:Nevada County:Lincoln
Coordinates: 37.3° North, 115.4° West (view map)
Paleocoordinates:6.2° South, 84.8° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Ordovician Epoch:Early/Lower Ordovician
Stage:late Early Ordovician 10 m.y. bin:Ordovician 2
Key time interval:Blackhillsian Trilobite zone: I?
Age range of interval:478.60000 - 471.80000 m.y. ago
Stratigraphy
Formation:Ninemile
Regional section:Pahranagat Range (Ross, 1966) Regional bed:902 ft
Regional order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Ibexian; Blackhillsian
Lithology and environment
Primary lithology: lithified "limestone"
Lithology description: nodular; cherty; silty
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.
Taxonomic list comments:Dasycladacean algae
Metadata
Also known as:SF 617
Database number:104551
Authorizer:S. Finnegan Enterer:S. Finnegan
Modifier:M. Uhen Research group:marine invertebrate
Created:2011-02-07 12:04:21 Last modified:2018-11-15 16:32:05
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]