D 709 CO: Whiterockian, Nevada
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Rhynchonellata
- Orthida
- Nanorthidae
|
|||||||
|
Orthambonites cf. swanensis
Ulrich and Cooper 1938
|
|||||||
| Ross and Barnes 1967 | |||||||
|
Rhynchonellata
- Orthida
- Orthidae
|
|||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Nye |
| Coordinates: | 37.1° North, 116.5° West (view map) | ||||
| Paleocoordinates: | 14.2° North, 124.8° West (Wright 2013) | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | small collection |
Time
| Period: | Ordovician | ||
| 10 m.y. bin: | Ordovician 2-4 | ||
| Key time interval: | Whiterockian | Zone: | M? |
| Age range of interval: | 470 - 457 m.y. ago |
Stratigraphy
| Geological group: | Pogonip | Formation: | Antelope Valley | Member: | Unit I |
| Local section: | Nevada Test Site | Local bed: | 375 feet from base of "Unit I" of Johnson and Hibbard, 1957 ft | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Whiterockian. Unit I of Johnson and Hibbard, 1957. | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" | ||
| Lithology description: medium-bedded | |||
| Environment: | shallow subtidal indet. | Tectonic setting: | passive margin |
| Geology comments: carbonate platform | |||
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 154 | ||
| Database number: | 104295 | ||
| Authorizer: | S. Finnegan, J. Marcot | Enterer: | S. Finnegan, J. Marcot |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2011-02-07 12:04:21 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2011-02-07 12:04:21 |
| Creative Commons license: | CC0 | ||
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] |
Secondary references:
| 25413 | R. J., J.r. Ross and H. B. Barnes. 1967. Some Middle Ordovician Brachiopods and Trilobites from the Basin Ranges, Western United States. United States Geological Survey Professional Paper 523-D:D1-D4 [S. Finnegan/S. Finnegan/P. Wagner] |