USGS M144, 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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Bivalvia
- Ostreida
- Halobiidae
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Daonella dubia
(Gabb 1864)
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1 specimen | ||||||
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Cephalopoda
- Aulacoceratida
- Xiphoteuthididae
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Atractites nevadensis
(Meek 1877)
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3 specimens | ||||||
| recombined as Calliconites nevadensis | |||||||
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Cephalopoda
- Ceratitida
- Arcestidae
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Proarcestes gabbi
(Meek 1877)
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6 specimens | ||||||
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Cephalopoda
- Ceratitida
- Longobarditidae
|
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Longobardites cf. zsigmondyi
(Bockh 1874)
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5 specimens | ||||||
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Cephalopoda
- Ceratitida
- Aplococeratidae
|
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Aplococeras parvus
(Smith 1914)
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1 specimen | ||||||
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Cephalopoda
- Ceratitida
- Proteusitidae
|
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Tozerites humboldtensis
(Smith 1914)
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6 specimens | ||||||
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Cephalopoda
- Ceratitida
- Thanamitidae
|
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? Thanamites contractus
(Smith 1914)
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1 specimen | ||||||
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Cephalopoda
- Ceratitida
- Ceratitidae
|
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Nevadites humboldtensis
Smith 1914
|
25 specimens | ||||||
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Eutomoceras laubei
Meek 1877
|
1 specimen | ||||||
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Frechites occidentalis
(Smith 1914)
|
6 specimens | ||||||
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Cephalopoda
- Ceratitida
- Megaphyllitidae
|
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Humboldtites septentrionalis
(Smith 1914)
|
1 specimen | ||||||
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Cephalopoda
- Pseudorthocerida
- Trematoceratidae
|
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? Michelinoceras cf. campanile
(Mojsisovics 1869)
|
3 specimens | ||||||
| synonym of Trematoceras elegans | |||||||
| 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: | 243.80000 - 242.00000 m.y. ago |
Stratigraphy
| Geological group: | Star Peak | Formation: | Prida | Member: | Fossil Hill |
| Local section: | Fossil Hill Site A | Local bed: | 20.7 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Nevadites humboldtensis 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: | 38927 | ||
| Authorizer: | A. McGowan, M. Clapham | Enterer: | A. McGowan, M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2004-05-17 10:38:51 | Last modified: | 2013-04-16 23:38:56 |
| Access level: | the public | Released: | 2004-05-17 10:38:51 |
| 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] |