USGS loc. D990-CO, Spotted Range: Whiterockian, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Ostracoda
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Ostracoda indet.
Latreille 1802
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| "ostracodes" | ||||||||||
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Trilobita
- Asaphida
- Asaphidae
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? Isotelus sp.
Dekay 1824
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Trilobita
- Proetida
- Bathyuridae
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? Goniotelina cf. williamsi
(Ross 1951)
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Trilobita
- Phacopida
- Pterygometopidae
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Calliops aff. troosti
(Safford and Vogdes 1889)
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Trilobita
- Phacopida
- Cheiruridae
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? Ceraurinella sp.
Cooper 1953
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Conodonta
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Conodonta indet.
(Pander 1856)
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| "Conodonts" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Clark |
| Coordinates: | 36.8° North, 115.8° West (view map) | ||||
| Paleocoordinates: | 7.1° South, 82.3° West | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician |
| 10 m.y. bin: | Ordovician 2-4 |
| Key time interval: | Whiterockian |
| Age range of interval: | 470 - 457 m.y. ago |
Stratigraphy
| Geological group: | Pogonip | Formation: | Antelope Valley | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Porterfieldian was the upper bound for some reason: | |||||
Lithology and environment
| Primary lithology: | fine,gray lithified silty "limestone" | ||
| Lithology description: bioclastic; “ghost†fossils | |||
| Environment: | deep subtidal shelf | Tectonic setting: | passive margin |
| Geology comments: middle shelf | |||
Taphonomy
| Modes of preservation: | body,replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USGS |
| Collectors: | J. Ross, Jr. |
Metadata
| Database number: | 226715 | ||
| Authorizer: | J. Marcot | Enterer: | J. Marcot |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2022-07-21 11:37:42 | Last modified: | 2023-09-06 12:56:31 |
| Access level: | the public | Released: | 2022-07-21 11:37:42 |
| 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] |