USNM 41938, Split Mountain, Clayton Ridge: Dyeran, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Ptychopariida
- Ptychopariidae
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informal Ptychopariidae informal sp. A
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2 specimens | |||||||||
| "Ptychopariid sp.A"; total of 4 cranidia from loc. 41938 and 41939 | ||||||||||
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Ptychopariidae indet.
Matthew 1887
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1 specimen | |||||||||
| "Kochaspid? sp." | ||||||||||
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Trilobita
- Redlichiida
- Olenellidae
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Olenellus sp.
Hall 1861
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4 specimens | |||||||||
| total of seven fragmented cephala from loc. USNM 41938 and 41939 | ||||||||||
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Trilobita
- Redlichiida
- Biceratopsidae
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Bolbolenellus brevispinus
Palmer 1998
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1 specimen | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Esmeralda |
| Coordinates: | 37.7° North, 117.5° West (view map) | ||||
| Paleocoordinates: | 1.2° South, 95.0° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| 10 m.y. bin: | Cambrian 2-3 | ||
| Key time interval: | Dyeran | Trilobite zone: | Olenellus |
| Age range of interval: | 514.8 - 511 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | lithified argillaceous mudstone |
| Lithology description: basal 20m of Emigrant Formation consists of mudrock facies containing a few thin, argillaceous limestone beds | |
| Environment: | offshore shelf |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 69204 | ||
| Authorizer: | W. Kiessling | Enterer: | B. Brenneis |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2007-02-21 07:28:13 | Last modified: | 2015-08-20 08:09:26 |
| Access level: | the public | Released: | 2007-02-21 07:28:13 |
| 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] |