Ninemile Shale, Whiterock Canyon, Table D.51: Arenig, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Rhombifera
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Rhombifera sp.
Zittel 1879
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6 specimens | ||||||
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Ostracoda
- Leperditicopida
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? Leperditicopida indet.
Scott 1961
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1 specimen | ||||||
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Trilobita
- Asaphida
- Asaphidae
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? Protopresbynileus sp.
Hintze 1954
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3 specimens | ||||||
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Lachnostoma sp.
Ross 1951
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45 specimens | ||||||
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Trilobita
- Trinucleida
- Raphiophoridae
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Ampyx sp.
(Dalman 1827)
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8 specimens | ||||||
| original and current combination Asaphus (Ampyx) | |||||||
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Agnostida
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Agnostida indet.
Salter 1864
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3 specimens | ||||||
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Polychaeta
- Phyllodocida
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Machaeridia indet.
|
6 specimens | ||||||
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Lingulata
- Siphonotretida
- Siphonotretidae
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? Schizambon sp.
Walcott 1884
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2 specimens | ||||||
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Lingulata
- Lingulida
- Obolidae
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? Lingulella sp.
Salter 1866
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71 specimens | ||||||
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Strophomenata
- Billingsellida
- Polytoechiidae
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? Tritoechia sp.
Ulrich and Cooper 1936
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12 specimens | ||||||
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Rhynchonellata
- Pentamerida
- Clarkellidae
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? Syntrophina sp.
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3 specimens | ||||||
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Stenolaemata
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Stenolaemata indet.
Borg 1926
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1 specimen | ||||||
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Gastropoda
- Bellerophontida
- Tropidodiscidae
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? Peelerophon sp.
Yochelson 1982
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1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada |
| Coordinates: | 39.2° North, 116.4° West (view map) | ||
| Paleocoordinates: | 5.4° South, 82.2° West | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician |
| 10 m.y. bin: | Ordovician 2 |
| Key time interval: | Arenig |
| Age range of interval: | 477.70000 - 468.40000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | green lithified mudstone | ||
| Secondary lithology: | lenticular,gray lithified lime mudstone | ||
| Includes fossils? | Y | ||
| Environment: | offshore | Tectonic setting: | passive margin |
Taphonomy
| Modes of preservation: | body,mold/impression,original calcite |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | excellent |
| Abundance in sediment: | common |
| Articulated whole bodies: | some |
| Associated major elements: | some |
| Disassociated major elements: | some |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection |
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 64601 | ||
| Authorizer: | S. Peters | Enterer: | S. Peters |
| Modifier: | J. Marcot | Research group: | marine invertebrate |
| Created: | 2006-09-10 16:56:38 | Last modified: | 2023-09-05 14:41:51 |
| Access level: | the public | Released: | 2006-09-10 16:56:38 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13544. | S. E. Peters. 2003. Evenness, richness and the Cambrian-Paleozoic faunal transition in North America: an assemblage-level perspective. The University of Chicago 1-279 [S. Peters/S. Peters/P. Wagner] |