Upper Tybo Shale, Stop 2.2, Tybo Canyon: Franconian, Nevada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Olenida
- Aphelaspidae
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Litocephalus magnus
Palmer 1965
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Nevada |
| Coordinates: | 38.0° North, 116.0° West (view map) | ||
| Paleocoordinates: | 3.2° South, 89.4° 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: | Franconian | Trilobite zone: | Elvinia |
| Age range of interval: | 497.00000 - 485.40000 m.y. ago |
Stratigraphy
| Formation: | Tybo Shale | Member: | Upper | ||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: Elvinia zone. Listed as Lower Franconian Age | |||||
Lithology and environment
| Primary lithology: | green poorly lithified calcareous "shale" |
| Lithology description: Olive-green limy shale with subordinate amounts of thin-bedded (2-5 cm thick) calcarenite | |
| Environment: | slope |
| Geology comments: Outer fan fringe facies; Lower slope fan with density current deposition of calcarenites (as evidenced by presence of plane-parallel laminations, cross laminations, and rare directional sole markings) | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Spatial orientation: | life position |
| Size sorting: | poor |
| Fragmentation: | none |
| Temporal resolution: | time-averaged |
| Spatial resolution: | autochthonous |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Only including autochthonous taxa | |
Metadata
| Database number: | 75436 | ||
| Authorizer: | P. Novack-Gottshall | Enterer: | P. Hearn |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2007-10-09 09:01:52 | Last modified: | 2018-06-29 23:36:54 |
| Access level: | the public | Released: | 2007-10-09 09:01:52 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 25446. | H. E. Cook, M. E. Taylor, and J. F. Miller. 1989. Day 2: Late Cambrian and Early Ordovician stratigraphy, biostratigraphy and depositional environments, Hot Creek Range, Nevada. 28th International Geological Congress 28-36 [P. Novack-Gottshall/P. Hearn/M. Uhen] |