USGS M142, Fossil Hill: Illyrian, Nevada
collected by N.J. Silberling 1956-1965
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ceratitida
- Proteusitidae
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Tropigastrites louderbacki
(Hyatt and Smith 1905)
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3 specimens | ||||||
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Cephalopoda
- Ceratitida
- Aplococeratidae
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Aplococeras smithi
Silberling and Nichols 1982
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1 specimen | ||||||
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Cephalopoda
- Ceratitida
- Longobarditidae
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Longobardites parvus
(Smith 1914)
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3 specimens | ||||||
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Cephalopoda
- Ceratitida
- Ceratitidae
|
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Frechites nevadanus
(Mojsisovics 1888)
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4 specimens | ||||||
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Gymnotoceras blakei
(Gabb 1864)
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23 specimens | ||||||
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Eutomoceras dunni
Smith 1904
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6 specimens | ||||||
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Cephalopoda
- Nautilida
- Grypoceratidae
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Grypoceras whitneyi
(Gabb 1864)
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1 specimen | ||||||
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Cephalopoda
- Pseudorthocerida
- Trematoceratidae
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? Michelinoceras cf. campanile
(Mojsisovics 1869)
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6 specimens | ||||||
| synonym of Trematoceras elegans | |||||||
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Cephalopoda
- Aulacoceratida
- Xiphoteuthididae
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Atractites solidus
Smith 1914
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3 specimens | ||||||
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Bivalvia
- Ostreida
- Halobiidae
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Daonella cf. sturi
(Benecke 1868)
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Pershing |
| Coordinates: | 40.3° North, 118.1° West (view map) | ||||
| Paleocoordinates: | 10.9° North, 41.8° 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: | meeki |
| Age range of interval: | 243.80000 - 242.00000 m.y. ago |
Stratigraphy
| Geological group: | Star Peak | Formation: | Prida | Member: | Fossil Hill |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Frechites nevadanus 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 |
| Articulated whole bodies: | some |
| Associated major elements: | some |
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: | 38925 | ||
| Authorizer: | A. McGowan, M. Clapham | Enterer: | A. McGowan, M. Clapham |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2004-05-17 10:27:27 | Last modified: | 2019-06-07 13:44:21 |
| Access level: | the public | Released: | 2004-05-17 10:27:27 |
| 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] |