Bed: D2741CO: Richmondian, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata - Rhynchonellida - Rhynchotrematidae
Strophomenata - Strophomenida - Strophomenidae
Strophomena sp. Rafinesque and De Blainville 1824
Trilobita - Trinucleida - Trinucleidae
Cryptolithoides sp. Whittington 1941
Trilobita - Asaphida - Asaphidae
Trilobita - Corynexochida - Styginidae
Styginidae indet. Vogdes 1890
Trilobita - Phacopida - Cheiruridae
Trilobita - Proetida - Otarionidae
Otarion sp. Zenker 1833
see common names

Geography
Country:United States State/province:Nevada
Coordinates: 39.0° North, 116.0° West (view map)
Paleocoordinates:9.2° South, 131.6° West (Wright 2013)
Basis of coordinate:estimated from map
Geographic resolution:hand sample
Time
Period: Ordovician Epoch: Late Ordovician
Stage: Katian 10 m.y. bin: Ordovician 5
Key time interval: Richmondian
Age range of interval: 449.6 - 445.5 m.y. ago
Stratigraphy
Formation:Hanson Creek Member:Middle
Stratigraphic resolution:group of beds
Stratigraphy comments: Listed as Middle Ashgillian. Middle Limestone and Dolomite
Lithology and environment
Primary lithology:concretionary lithified silty "limestone"
Lithology description: Nodular, silty, light-gray, mottled gray-orange limestone
Environment:deep subtidal shelf
Geology comments: Listed as Deep Mid-shelf
Taphonomy
Modes of preservation:body,trace,concretion
Size of fossils:macrofossils
Articulated whole bodies:some
Fragmentation:none
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Collection method comments: Samples chosen at random
Metadata
Database number:78048
Authorizer:P. Novack-Gottshall Enterer:P. Hearn
Modifier:P. Wagner Research group:marine invertebrate
Subset of collection #:359
Created:2008-01-25 08:41:18 Last modified:2025-02-22 15:12:02
Access level:the public Released:2008-01-25 08:41:18
Creative Commons license:CC0
Reference information

Primary reference:
26322. R. J. Ross, Jr., T. B. Nolan, and A.G. Harris. 1980. The Upper Ordovician and Silurian Hanson Creek Formation of central Nevada. United States Geological Survey Professional Paper (1126-A-J)C1-C22 [P. Novack-Gottshall/P. Hearn/R. McClees-Funinan]