Nopah Formation, Sample 2300-CO, Member B: Steptoean, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
unclassified
|
|||||||
|
Acrotretid indet.
|
|||||||
|
Lingulata
- Acrotretida
|
|||||||
|
Acrotretida indet.
Kuhn 1949
|
|||||||
|
Trilobita
- Olenida
- Pterocephaliidae
|
|||||||
|
Morosa longispina
Palmer 1960
|
|||||||
|
Pterocephalia elongata
Palmer 1960
|
|||||||
|
Sigmocheilus grata
(Resser 1942)
|
|||||||
|
Trilobita
- Olenida
- Dokimokephalidae
|
|||||||
|
Pinctus sp.
Wilson 1951
|
|||||||
|
Trilobita
- Olenida
- Aphelaspidae
|
|||||||
|
Litocephalus granulomarginatus
Palmer 1960
|
|||||||
|
Trilobita
- Olenida
- Olenidae
|
|||||||
|
Olenus wilsoni
|
|||||||
|
Olenus granulatus
Palmer 1960
|
|||||||
| recombined as Simulolenus granulatus | |||||||
|
Trilobita
- Ptychopariida
- Elviniidae
|
|||||||
|
Dunderbergia nitida
|
|||||||
|
Elvinia sp.
Walcott 1924
|
|||||||
|
Elburgia quinnensis
(Resser 1942)
|
|||||||
|
Agnostida
- Diplagnostidae
|
|||||||
|
Pseudagnostus communis
(Hall and Whitfield 1877)
|
|||||||
|
Agnostida
- Phalacromidae
|
|||||||
|
Phalacroma sp.
Hawle and Corda 1847
|
|||||||
|
Agnostida
- Agnostidae
|
|||||||
|
Homagnostus lumidosus
|
|||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada |
| Coordinates: | 39.0° North, 116.0° West (view map) | ||
| Paleocoordinates: | 3.2° South, 88.4° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | small collection |
Time
| Period: | Cambrian | Epoch: | Furongian |
| 10 m.y. bin: | Cambrian 5 | ||
| Key time interval: | Steptoean | Trilobite zone: | Dunderbergia |
| Age range of interval: | 497.00000 - 493.00000 m.y. ago |
Stratigraphy
| Formation: | Nopah | Member: | Dunderberg Shale B | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Listed as upper half of Dunderbergia zone | |||||
Lithology and environment
| Primary lithology: | shelly/skeletal lithified "limestone" |
| Secondary lithology: | poorly lithified "shale" |
| Lithology description: Dominantly fossiliferous limestone interbedded with shale | |
| Environment: | slope |
| Geology comments: Fossils only in limestones | |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | -multiple events |
| Size of fossils: | macrofossils,mesofossils |
| Spatial orientation: | life position |
| Articulated whole bodies: | some |
| Size sorting: | poor |
| Fragmentation: | occasional |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Upper half of Dunderbergia zone age; Trilobite systematics with some phosphatic inarticulates mentioned; however, this is probably an accurate portrayal of full fauna | |
Metadata
| Database number: | 75271 | ||
| Authorizer: | P. Novack-Gottshall | Enterer: | P. Hearn |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2007-10-03 13:12:13 | Last modified: | 2018-06-29 20:29:40 |
| Access level: | the public | Released: | 2007-10-03 13:12:13 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 25421. | A. R. Palmer. 1960. Trilobites of the Upper Cambrian Dunderberg Shale, Eureka District, Nevada. United States Geological Survey Professional Paper 334-C:53-107 [P. Novack-Gottshall/P. Hearn/M. Hopkins] |