D 844 CO: Rangerian, Nevada

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Ostracoda - Palaeocopida - Leperditellidae
Leperditella sp.
Ostracoda - Palaeocopida - Schmidtellidae
Schmidtella sp. Ulrich 1892
Rhynchonellata - Orthida - Orthidiellidae
Orthidiella sp. Ulrich and Cooper 1936
see common names

Geography
Country:United States State/province:Nevada
Coordinates: 38.0° North, 117.0° West (view map)
Paleocoordinates:5.4° South, 82.9° West
Basis of coordinate:estimated from map
Geographic resolution:hand sample
Time
Period: Ordovician Epoch: Early Ordovician
Stage: Floian 10 m.y. bin: Ordovician 2
Key time interval: Rangerian Brachiopod zone:  Paralenorthis-Orthidiella
Age range of interval: 470 - 469.1 m.y. ago
Stratigraphy
Geological group:Pogonip Formation:Ninemile
Stratigraphic resolution:group of beds
Stratigraphy comments: Listed as Middle Arenig?; local series:zone L; C67-C68. Age (for upper Ninemile: probably Castlemanian) from Loch 2002 (GSA Abstract, accessed from Georef)
Lithology and environment
Primary lithology:black,green poorly lithified "shale"
Lithology description: Black and green shale
Environment:slope
Geology comments: Environment listed as upper slope, zone 5
Taphonomy
Modes of preservation:body
Degree of concentration:-multiple events
Size of fossils:mesofossils,microfossils
Temporal resolution:time-averaged
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:Dominant taxa?; fauna equivalent to Kanosh Shale; probably zone L age
Metadata
Also known as:USGS D-844-CO
Database number:77183
Authorizer:P. Novack-Gottshall Enterer:P. Hearn
Modifier:J. Marcot Research group:marine invertebrate
Created:2007-12-28 10:49:43 Last modified:2023-09-05 14:41:26
Access level:the public Released:2007-12-28 10:49:43
Creative Commons license:CC BY
Reference information

Primary reference:
25410. R. J. Ross, Jr. and C. R. Longwell. 1964. Middle and Lower Ordovician Formations in Southernmost Nevada and Adjacent California. United States Geological Survey Bulletin 1180-C:C1-C101 [S. Finnegan/S. Finnegan/J. Marcot]

Secondary references:

42733 W. C. Sweet and C. M. Tolbert. 1997. An Ibexian (Lower Ordovician) Reference Section in the Southern Egan Range, Nevada, for a Conodont-Based Chronostratigraphy. United States Geological Survey Professional Paper 1579–B:53-81 [P. Wagner/P. Wagner]