Separation Canyon, USGS 27028-PC: Morrowan, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Crinoidea
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Crinoidea indet.
Miller 1821
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| Columnals | ||||||||||
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Gastropoda
- Euomphalina
- Euomphalidae
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Straparollus sp.
de Montfort 1810
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Bivalvia
- Myalinida
- Myalinidae
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Septimyalina sp.
Newell 1942
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Bivalvia
- Pectinida
- Aviculopectinidae
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Aviculopecten gravidus
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Bivalvia
- Ostreida
- Pterineidae
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Leptodesma sp.
Hall 1883
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Rhynchonellata
- Athyridida
- Athyrididae
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Composita ovata
Mather 1915
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Arizona |
| Coordinates: | 35.8° North, 113.6° West (view map) | ||
| Paleocoordinates: | 1.2° North, 44.0° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Carboniferous | Epoch: | Pennsylvanian |
| Stage: | Bashkirian | 10 m.y. bin: | Carboniferous 4 |
| Key time interval: | Morrowan | ||
| Age range of interval: | 323.20000 - 318.40000 m.y. ago |
Stratigraphy
| Geological group: | Supai | Formation: | Watahomigi | ||
| Local section: | Separation Canyon | ||||
| Regional section: | Grand Canyon | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: The Watahomigi is comprised of three informal units: a lower slope unit, a middle cliff unit, and an upper slope unit. | |||||
Lithology and environment
| Primary lithology: | very fine,fine,brown,gray lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: Limestone, light-brownish-gray, aphantic to fine-graned, massive, thick-bedded (2.5 ft); forms resistant ledge. | |
| Environment: | shallow subtidal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Museum repositories: | USGS |
Metadata
| Also known as: | Separation Canyon, 58 feet above base of formation | ||
| Database number: | 42702 | ||
| Authorizer: | J. Alroy | Enterer: | C. Simpson |
| Modifier: | C. Simpson | Research group: | marine invertebrate |
| Created: | 2004-08-04 13:00:08 | Last modified: | 2004-08-04 16:00:09 |
| Access level: | the public | Released: | 2004-08-04 13:00:08 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 11207. | E. D. McKee. 1982. The Supai Group of the Grand Canyon. United States Geological Survey Professional Paper 1173 [J. Alroy/C. Simpson/C. Simpson] |