USNM 41963, Split Mountain, Clayton Ridge: Delamaran, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Ptychopariida
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Tonopahella goldfieldensis
Sundberg and McCollum 2003
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| total of 55 specimens (incl. paratypes) from 9 USNM Split Mt. loc. | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Esmeralda |
| Coordinates: | 37.7° North, 117.5° West (view map) | ||||
| Paleocoordinates: | 1.0° South, 93.5° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | ||
| 10 m.y. bin: | Cambrian 3 | ||
| Key time interval: | Delamaran | Trilobite zone: | Amecephalus arrojosensis |
| Age range of interval: | 511 - 506.5 m.y. ago |
Stratigraphy
| Formation: | Emigrant | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 9.5 to 15m above base of Emigrant Formation; Amecephalus arrojosensis Biozone of lower Middle Cambrian | |||||
Lithology and environment
| Primary lithology: | lithified silty lime mudstone |
| Secondary lithology: | concretionary lithified lime mudstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: interval from 9.85 to 15m above base of Emigrant Formation within a mudstone, beginning with silty limestone, ending with concretionary, bioclastic limestone | |
| Environment: | offshore shelf |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 69408 | ||
| Authorizer: | W. Kiessling | Enterer: | B. Brenneis |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2007-02-26 03:38:57 | Last modified: | 2022-08-02 16:40:22 |
| Access level: | the public | Released: | 2007-02-26 03:38:57 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 19951. | F. A. Sundberg and L.B. McCollum. 2003. Early and Mid Cambrian Trilobites from the Outer-shelf Deposits of Nevada and California, USA. Palaeontology 46(5):945-986 [W. Kiessling/B. Brenneis] |