Dunderberg Shale. Nopah Formation; Ruby Range, Eureka, McGill (all NV), and Fish Springs (UT): Steptoean, Nevada and Utah
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Helcionelloida
- Helcionellida
- Pelagiellidae
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Pelagiella sp.
Matthew 1895
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Lingulata
- Lingulida
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Lingulida indet.
Waagen 1885
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Lingulata
- Acrotretida
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Acrotretida indet.
Kuhn 1949
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Trilobita
- Corynexochida
- Cheilocephalidae
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Cheilocephalus brachyops
Palmer 1965
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Trilobita
- Ptychopariida
- Phylacteridae
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Aphelotoxon sp.
Palmer 1965
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Trilobita
- Ptychopariida
- Elviniidae
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Dunderbergia anyta
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Dunderbergia varigranula
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Dunderbergia nitida
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Dunderbergia bigranulosa
Palmer 1960
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Dunderbergia polybothra
Palmer 1960
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Dytremacephalus granulosus
Palmer 1954
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Dytremacephalus asperaxis
Palmer 1965
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Elburgia granulosa
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Trilobita
- Olenida
- Aphelaspidae
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Erixanium sp.
Opik 1963
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Trilobita
- Olenida
- Pterocephaliidae
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Sigmocheilus notha
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Cernuolimbus granulosus
Palmer 1965
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Pterocephalia punctata
Palmer 1965
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Pterocephalia concava
Palmer 1960
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Prehousia diverta
Palmer 1965
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Trilobita
- Olenida
- Olenidae
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Simulolenus wilsoni
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Agnostida
- Agnostidae
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Homagnostus sp.
Howell 1935
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Agnostida
- Diplagnostidae
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Pseudagnostus communis
(Hall and Whitfield 1877)
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada and Utah |
| Coordinates: | 40.0° North, 115.0° West (view map) | ||
| Paleocoordinates: | 3.9° South, 87.4° West |
Time
| Period: | Cambrian | Epoch: | Furongian |
| 10 m.y. bin: | Cambrian 5 | ||
| Key time interval: | Steptoean | ||
| Age range of interval: | 497 - 493 m.y. ago |
Stratigraphy
| Formation: | Nopah | Member: | Dunderberg Shale | ||
| Stratigraphy comments: Lower and middle Dunderbergia zone age (probably members A and B); Primarily trilobites listed; 20 samples from several Great Basin localities |
Lithology and environment
| Primary lithology: | lithified calcareous wackestone |
| Lithology description: Lime wackestones and packstones | |
| Environment: | offshore shelf |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | life position |
| Size sorting: | poor |
| Fragmentation: | occasional |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 74910 | ||
| Authorizer: | P. Novack-Gottshall | Enterer: | P. Hearn |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2007-09-05 13:00:24 | Last modified: | 2008-02-20 18:19:41 |
| Access level: | the public | Released: | 2007-09-05 13:00:24 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 25266. | D. J. McBride. 1976. Outer shelf communities and trophic groups in the Upper Cambrian of the Great Basin. Brigham Young University Geology Studies 23(2):139-152 [P. Novack-Gottshall/P. Hearn/J. Ju] |