D 924 CO: Whiterockian, California
collected by J. Ross, Jr.
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Asaphida
- Asaphidae
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? Isotelus spurius
Phleger 1933
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| recombined as Anataphrus spurius | |||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | California | County: | Inyo |
| Coordinates: | 36.9° North, 118.1° West (view map) | ||||
| Paleocoordinates: | 5.8° South, 85.1° West | ||||
| 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: | O? |
| Age range of interval: | 470.00000 - 457.00000 m.y. ago |
Stratigraphy
| Formation: | Barrel Spring | ||||
| Regional order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Whiterockian | |||||
Lithology and environment
| Primary lithology: | lithified "shale" | ||
| Lithology description: laminated; brown; black to brown, laminated in places, shaly to flaggy parting, sand and silt near top of unit | |||
| Environment: | offshore shelf | Tectonic setting: | passive margin |
| Geology comments: outer 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 193 | ||
| Database number: | 104325 | ||
| Authorizer: | S. Finnegan | Enterer: | S. Finnegan |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2011-02-07 12:04:21 | Last modified: | 2020-11-06 14:00:53 |
| Access level: | the public | Released: | 2011-02-07 12:04:21 |
| 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] |