USGS M144 -6 ft, Fossil Hill: Illyrian, Nevada
collected by N.J. Silberling 1956-1965

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda - Orthocerida - Orthoceratidae
? Michelinoceras cf. campanile (Mojsisovics 1869)
1 specimen
Cephalopoda - Ceratitida - Aplococeratidae
Aplococeras parvus (Smith 1914)
6 specimens
Cephalopoda - Ceratitida - Arcestidae
Proarcestes gabbi (Meek 1877)
6 specimens
Cephalopoda - Ceratitida - Proteusitidae
Tozerites humboldtensis (Smith 1914)
1 specimen
Cephalopoda - Ceratitida - Ceratitidae
Eutomoceras laubei Meek 1877
4 specimens
Frechites occidentalis (Smith 1914)
10 specimens
Nevadites hyatti (Smith 1904)
11 specimens
see common names

Geography
Country:United States State/province:Nevada County:Pershing
Coordinates: 40.3° North, 118.1° West (view map)
Paleocoordinates:11.2° North, 42.3° West
Basis of coordinate:estimated from map
Geographic resolution:small collection
Time
Period:Triassic Epoch:Middle Triassic
Stage:Anisian 10 m.y. bin:Triassic 2
Key time interval:Illyrian Ammonoid zone: occidentalis
Age range of interval:247.20000 - 242.00000 m.y. ago
Stratigraphy
Geological group:Star Peak Formation:Prida Member:Fossil Hill
Local section:Fossil Hill Site A Local bed:18.9 m
Local order:bottom to top
Stratigraphic resolution:bed
Stratigraphy comments: Nevadites gabbi beds
Lithology and environment
Primary lithology:lenticular,gray lithified "limestone"
Secondary lithology: lithified calcareous "siliciclastic"
Includes fossils?Y
Lithology description: (p. 3) the Fossil Hill Member, which is dark-gray, commonly fossiliferous, lenticular limestone interbedded with calcareous mudstone, siltstone, and shale.
Environment:basinal (carbonate)
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:USNM
Collectors:N.J. Silberling Collection dates:1956-1965
Metadata
Database number:142870
Authorizer:M. Clapham Enterer:M. Clapham
Research group:marine invertebrate
Created:2013-04-17 14:41:00 Last modified:2013-04-16 23:41:00
Access level:the public Released:2013-04-17 14:41:00
Creative Commons license:CC BY
Reference information

Primary reference:

10526. N. J. Silberling and K. M. Nichols. 1982. Middle Triassic Molluscan Fossils of Biostratigraphic Significance from the Humboldt Range, Northwestern Nevada. Geological Survey Professional Paper 1207 [A. McGowan/A. McGowan/A. McGowan]