Hidden Canyon, unnumbered collection, 80 ft above base of formation: Morrowan, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Trigoniida
- Schizodidae
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Schizodus sp.
King 1844
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Bivalvia
- Cardiida
- Kalenteridae
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Permophorus sp.
Chavan 1954
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Bivalvia
- Ostreida
- Pterineidae
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Leptodesma sp.
Hall 1883
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Bivalvia
- Pectinida
- Aviculopectinidae
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Aviculopecten sp.
M'Coy 1851
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Bivalvia
- Myalinida
- Myalinidae
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Myalina (Myalina) sp.
de Koninck 1842
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Rhynchonellata
- Athyridida
- Athyrididae
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Composita subtilia
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Rhynchonellata
- Spiriferida
- Spiriferidae
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Anthracospirifer tanoensis
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Arizona |
| Coordinates: | 36.5° North, 113.6° West (view map) | ||
| Paleocoordinates: | 1.7° North, 43.5° 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: | Hidden Canyon | Local bed: | 1 | ||
| Local order: | bottom to top | ||||
| 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,gray lithified "limestone" |
| Secondary lithology: | planar lamination,red or brown lithified siltstone |
| Includes fossils? | Y |
| Lithology description: Concealed slope, reddish surface, with thin ledges of reddish-brown siltstone, sandstone, and limestone, and patches of mudstone cropping out locally; limestone is light gray, aphantic to fine-grained, weathers cream-colored; siltstone is very friable, laminated. The unit is 106.5 feet thick. | |
| Environment: | shallow subtidal indet. |
Taphonomy
| Modes of preservation: | body,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Also known as: | Hidden Canyon collection 1. | ||
| Database number: | 42650 | ||
| Authorizer: | J. Alroy | Enterer: | C. Simpson |
| Modifier: | C. Simpson | Research group: | marine invertebrate |
| Created: | 2004-08-03 12:26:01 | Last modified: | 2004-08-03 15:27:32 |
| Access level: | the public | Released: | 2004-08-03 12:26:01 |
| 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] |