Volcano (Pilot Mountains): Lacian, Nevada
collected by J.D. Whitney

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Turbinidae
Turbo regius n. sp. Gabb 1870
Gabb 1870
listed as "Jurassic" so maybe a different locality?
Bivalvia - Cardiida - Anthracosiidae
Myacites depressus Meek 1864
Gabb 1870
Bivalvia - Pholadomyida - Pholadomyidae
Pholadomya nevadana n. sp. Gabb 1870
Gabb 1870
Goniomya aperta n. sp. Gabb 1870
Gabb 1870
Bivalvia - Carditida - Astartidae
Astarte appressa n. sp. Gabb 1870
Gabb 1870
Bivalvia - Carditida - Carditidae
Cardium arcaeformis n. sp. Chapman and Crespin 1934
Gabb 1870
synonym of Glyptoactis (Fasciculicardia) latissima
listed as "Jurassic" so maybe a different locality?
Bivalvia - Pectinida - Plicatulidae
Plicatula perimbricata n. sp. Gabb 1870
Gabb 1870
listed as "Jurassic" so maybe a different locality?
Bivalvia - Pectinida - Neitheidae
Pecten acutiplicatus Meek 1864
Gabb 1870
replaced by Weyla (Weyla) meeki
Bivalvia - Ostreida - Cassianellidae
Cassianella lingulata Gabb 1870
Gabb 1870
Cephalopoda - Ammonitida
Ammonites nevadanus n. sp. Gabb 1870
Gabb 1870
listed as "Jurassic" so maybe a different locality?
Cephalopoda - Ceratitida - Arcestidae
Joannites nevadanus n. sp. Hyatt and Smith 1905
recombined as Proarcestes nevadanus
Rhynchonellata - Spiriferida - Spiriferidae
Spirifer obtusus n. sp. Gabb 1870
Gabb 1870
listed as "Trias of Volcano" so probably this locality?
see common names

Geography
Country:United States State/province:Nevada County:Mineral
Coordinates: 38.4° North, 118.0° West (view map)
Paleocoordinates:15.1° North, 54.2° West
Basis of coordinate:based on nearby landmark
Time
Period:Triassic Epoch:Late/Upper Triassic
Stage:Norian 10 m.y. bin:Triassic 4
*Period:Middle Triassic
Key time interval:Lacian
Age range of interval:227.00000 - 216.70000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Luning
Stratigraphic resolution:group of beds
Stratigraphy comments: Age given as "Upper Muschelkalk" but Luning Formation is only Triassic unit exposed in vicinity. If the species is the same as the Proarcestes sp. collected by Kristan-Tollmann & Tollmann (1983) in Dunlap Canyon, it suggests a Lacian age (kerri zone) as stated by those authors.
Lithology and environment
Primary lithology: lithified "limestone"
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:MCZ
Collectors:J.D. Whitney
Metadata
Database number:33202
Authorizer:D. Bottjer, J. Marcot Enterer:C. Powers, J. Marcot
Modifier:M. Clapham Research group:marine invertebrate
Created:2003-07-23 17:36:09 Last modified:2013-04-13 11:34:04
Access level:the public Released:2003-07-23 17:36:09
Creative Commons license:CC BY
Reference information

Primary reference:
8855. A. Hyatt and J. P. Smith. 1905. The Triassic cephalopod genera of America. United States Geological Survey Professional Paper 40:1-394 [D. Bottjer/C. Powers/M. Clapham]

Secondary references:

72501 W. M. Gabb. 1870. Descriptions of some secondary fossils from the Pacific states. American Journal of Conchology 5:5-18 [J. Marcot/J. Marcot]
8848 J. P. Smith. 1914. The Middle Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 83:1-254 [D. Bottjer/C. Powers/M. Clapham]