USGS 11659-PC, Little Sheep Creek: Lopingian, Montana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Dictyoconites cf. groenlandicus
Fischer 1947
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Montana |
| Coordinates: | 44.7° North, 112.8° West (view map) | ||
| Paleocoordinates: | 16.8° North, 33.2° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Lopingian |
| 10 m.y. bin: | Permian 4 | ||
| Key time interval: | Lopingian | ||
| Age range of interval: | 259.51 - 251.902 m.y. ago |
Stratigraphy
| Formation: | Phosphoria | Member: | Retort | ||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 7.6 foot thick interval, 20.8 feet above base of member. Davydov et al. 2017 dated an ash bed in the upper Meade Peak Member at 260.57 ± 0.07 / 0.14 / 0.31 Ma, indicating that the Meade Peak is as young as uppermost Capitanian. | |||||
Lithology and environment
| Primary lithology: | phosphatic lithified mudstone |
| Environment: | offshore |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 107763 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2011-04-14 11:58:08 | Last modified: | 2018-11-25 22:00:22 |
| Access level: | the public | Released: | 2011-04-14 11:58:08 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 35827. | M. Gordon. 1966. Permian coleoid cephalopods from the Phosphoria Formation in Idaho and Montana. United States Geological Survey Professional Paper 550-B:B28-B35 [M. Clapham/M. Clapham] |