Northern Montezuma Range, Poleta Fm., Nevadella zone, section IS 134: Montezuman, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Redlichiida
- Holmiidae
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Grandinasus argentus
(Walcott 1910)
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada | County: | Esmeralda |
| Coordinates: | 37.7° North, 117.3° West (view map) | ||||
| Paleocoordinates: | 3.5° South, 96.9° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| Stage: | Stage 3 | 10 m.y. bin: | Cambrian 2 |
| Key time interval: | Montezuman | Zone: | Nevadella |
| Age range of interval: | 519.9 - 514.8 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | lithified grainstone |
| Environment: | reef, buildup or bioherm |
| Geology comments: the main carbonate unit of the lower Poleta, about 70-80 m thick, incorporating beds and bioherms of algal-archaeocyathan boundstones and medium to thick
beds of carbonate grainstone, often oolitic. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 140574 | ||
| Authorizer: | W. Kiessling | Enterer: | M. Krause |
| Modifier: | M. Krause | Research group: | marine invertebrate |
| Created: | 2013-03-12 19:54:37 | Last modified: | 2013-03-12 09:30:08 |
| Access level: | authorizer only | Released: | 2013-06-12 19:54:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 45528. | J. S. Hollingsworth. 2006. Holmiidae (Trilobita: Olenellina) of the Montezuman Stage (Early Cambrian) in Western Nevada. Journal of Paleontology 80(2):309-332 [W. Kiessling/M. Krause] |