D1682 CO: Blackhillsian, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Rhynchonellata
- Orthida
- Hesperonomiidae
|
||||||||||
|
? Hesperonomia sp.
Ulrich and Cooper 1936
|
||||||||||
|
Trilobita
- Proetida
- Dimeropygidae
|
||||||||||
|
Ischyrotoma sp.
Raymond 1925
|
||||||||||
|
Trilobita
- Phacopida
- Pliomeridae
|
||||||||||
|
Pliomeridae indet.
Raymond 1913
|
||||||||||
| "Pliomerid" | ||||||||||
|
Trilobita
- Asaphida
- Asaphidae
|
||||||||||
|
Trigonocerca sp.
Ross 1951
|
||||||||||
| 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: | Floian | 10 m.y. bin: | Ordovician 2 |
| Key time interval: | Blackhillsian | Trilobite zone: | I? |
| Age range of interval: | 473.90000 - 470.00000 m.y. ago |
Stratigraphy
| Formation: | Ninemile | ||||
| Regional section: | Pahranagat Range (Ross, 1966) | Regional bed: | 943 ft | ||
| Regional order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Ibexian; Blackhillsian | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" | ||
| Lithology description: 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. |
Metadata
| Also known as: | SF 615 | ||
| Database number: | 104549 | ||
| 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 16:31:34 |
| 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] |