D 340kCO: Tulean, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita
- Asaphida
- Asaphidae
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? Presbynileus sp.
Hintze 1954
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? Trigonocerca sp.
Ross 1951
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Megistaspis? | ||||||||||
see common names |
Geography
Country: | United States | State/province: | Nevada | County: | Eureka |
Coordinates: | 39.2° North, 116.3° West (view map) | ||||
Paleocoordinates: | 4.7° South, 84.3° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | small collection |
Time
Period: | Ordovician | Epoch: | Early/Lower Ordovician |
Key time interval: | Tulean | Trilobite zone: | Protopliomerella contracta |
Age range of interval: | 485.40000 - 471.80000 m.y. ago |
Stratigraphy
Formation: | Ninemile | ||||
Regional section: | Antelope Valley Composite | Regional bed: | 1554 ft | ||
Regional order: | bottom to top | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: Ibexian; G2? |
Lithology and environment
Primary lithology: | lithified "shale" | ||
Lithology description: silty; calcareous; interbedded w/ledgy Ls | |||
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. |
Metadata
Also known as: | SF 612 | ||
Database number: | 104546 | ||
Authorizer: | S. Finnegan | Enterer: | S. Finnegan |
Modifier: | P. Wagner | Research group: | marine invertebrate |
Created: | 2011-02-07 12:04:21 | Last modified: | 2012-08-31 16:27:09 |
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] |