D1684 CO: Blackhillsian, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata
- Orthida
- Finkelnburgiidae
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Diparelasma sp.
Ulrich and Cooper 1936
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Trilobita
- Asaphida
- Asaphidae
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Trigonocerca typica
Ross 1951
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? Isoteloides sp.
Raymond 1910
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Trilobita
- Proetida
- Hystricuridae
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Psalikilus pikum
Hintze 1953
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Trilobita
- Proetida
- Bathyuridae
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? Bolbocephalus sp.
Whitfield 1890
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Trilobita
- Odontopleurida
- Odontopleuridae
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? Diacanthaspis sp.
Whittington 1941
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see common names |
Geography
Country: | United States | State/province: | Nevada | County: | Lincoln |
Coordinates: | 37.3° North, 115.4° West (view map) | ||||
Paleocoordinates: | 6.2° South, 84.8° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | small collection |
Time
Period: | Ordovician | Epoch: | Early/Lower Ordovician |
Stage: | late Early Ordovician | 10 m.y. bin: | Ordovician 2 |
Key time interval: | Blackhillsian | Trilobite zone: | I? |
Age range of interval: | 478.60000 - 471.80000 m.y. ago |
Stratigraphy
Formation: | Ninemile | ||||
Regional section: | Pahranagat Range (Ross, 1966) | Regional bed: | 902 ft | ||
Regional order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Ibexian; Blackhillsian |
Lithology and environment
Primary lithology: | lithified "limestone" | ||
Lithology description: nodular; cherty; silty | |||
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 |
Collectors: | J. Ross, Jr. |
Taxonomic list comments:Dasycladacean algae |
Metadata
Also known as: | SF 617 | ||
Database number: | 104551 | ||
Authorizer: | S. Finnegan | Enterer: | S. Finnegan |
Modifier: | M. Uhen | Research group: | marine invertebrate |
Created: | 2011-02-07 12:04:21 | Last modified: | 2018-11-15 16:32:05 |
Access level: | the public | Released: | 2011-02-07 12:04:21 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
25411. | R. J., J.r. Ross. 1970. Ordovician Brachiopods, Trilobites, and Stratigraphy in Eastern and Central Nevada. United States Geological Survey Professional Paper 639:1-99 [S. Finnegan/S. Finnegan/P. Wagner] |