Meade Peak Phosphatic Shale Member, Phosphoria Formation of Montana: Roadian, Montana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Belemnitida
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Belemnitida indet.
Zittel 1895
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Gastropoda
- Bellerophontida
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Bellerophon sp.
de Montfort 1808
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= Bellerophontoidea indet.
M'Coy 1851
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Wagner 2023 | ||||||
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Bivalvia
- Nuculanida
- Polidevciidae
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Polidevcia obesa
(White 1879)
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Polidevcia cf. obesa
(White 1879)
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Bivalvia
- Trigoniida
- Schizodidae
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Schizodus sp.
King 1844
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Lingulata
- Lingulida
- Discinidae
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Orbiculoidea sp.
d'Orbigny 1847
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Chondrichthyes
- Eugeneodontiformes
- Helicoprionidae
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Helicoprion sp.
Karpinsky 1899
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Osteichthyes
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Osteichthyes indet.
Huxley 1880
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Montana |
| Coordinates: | 47.1° North, 109.4° West (view map) | ||
| Paleocoordinates: | 18.1° North, 28.2° West | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | basin |
Time
| Period: | Permian | Epoch: | Guadalupian |
| Stage: | Roadian | 10 m.y. bin: | Permian 3 |
| Key time interval: | Roadian | ||
| Age range of interval: | 273.01 - 266.9 m.y. ago |
Stratigraphy
| Formation: | Phosphoria | Member: | Meade Peak Phosphatic Shale |
| Stratigraphic resolution: | member |
Lithology and environment
| Primary lithology: | phosphatic claystone |
| Secondary lithology: | black "limestone" |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: phosphatic claystone and dark, fine grained limestone. | |
| Environment: | marine indet. |
Taphonomy
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Bellerophon sp. collected from a chert, possibly Franson in age. | |
Metadata
| Database number: | 11280 | ||
| Authorizer: | A. Miller, P. Wagner | Enterer: | C. Ferguson, P. Wagner |
| Modifier: | C. Ferguson | Research group: | marine invertebrate |
| Created: | 2001-07-30 13:14:37 | Last modified: | 2006-07-13 16:09:26 |
| Access level: | the public | Released: | 2001-07-30 13:14:37 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4145. | 1% 17920 | E. L. Yochelson and D. H. Van Sickle. 1968. Biostratigraphy of the Phosphoria, Park City, and Shedhorn Formations; Geology of Permian Rocks in the Western Phosphate Field. United States Geological Survey Professional Paper 313(D):572-660 [A. Miller/C. Ferguson/P. Wagner] |
Secondary references:
| 9042 | P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner] |