Separation Canyon, USGS 25139-PC: Morrowan, Arizona
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Chondrichthyes
- Cochliodontiformes
- Cochliodontidae
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Deltodus sp.
Morris and Roberts 1862
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Dentition | ||||||||||
unclassified
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Pelmatozoa indet.
Leuckart 1848
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Debris | ||||||||||
Echinoidea
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Echinoidea indet.
(Leske 1778)
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Spines | ||||||||||
Bivalvia
- Nuculida
- Nuculidae
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Nuculopsis sp.
Girty 1912
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Bivalvia
- Cardiida
- Kalenteridae
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Permophorus sp.
Chavan 1954
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Bivalvia
- Mytilida
- Mytilidae
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Promytilus sp.
Newell 1942
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Bivalvia
- Pectinida
- Aviculopectinidae
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Aviculopecten gravidus
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Aviculopecten sp.
M'Coy 1851
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Bivalvia
- Ostreida
- Pterineidae
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Leptodesma sp.
Hall 1883
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Bivalvia
- Myalinida
- Myalinidae
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Septimyalina sp.
Newell 1942
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Rostroconchia
- Conocardiida
- Bransoniidae
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Pseudoconocardium sp.
Zavodowsky 1960
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Gastropoda
- Euomphalina
- Microdomatidae
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Microdoma sp.
Meek and Worthen 1867
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Gastropoda
- Euomphalina
- Euomphalidae
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Straparollus sp.
de Montfort 1810
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Gastropoda
- Murchisoniina
- Gosseletinidae
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Baylea sp.
de Koninck 1881
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Gastropoda
- Murchisoniina
- Eotomariidae
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Euconospira sp.
Ulrich and Scofield 1897
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Gastropoda
- Bellerophontida
- Bellerophontidae
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Bellerophontidae indet.
M'Coy 1851
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Rhynchonellata
- Spiriferida
- Spiriferidae
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Anthracospirifer tanoensis
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Rhynchonellata
- Athyridida
- Athyrididae
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Composita gibbosa
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Trilobita
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Trilobita indet.
Walch 1771
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Hypostome | ||||||||||
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: | gray lithified conglomeratic "limestone" |
Secondary lithology: | red or brown lithified conglomeratic sandstone |
Includes fossils? | Y |
Lithology description: Conglomerate, dark-reddish-brown, forms thin, resistant ledge. Matrix: gray and reddish-brown sandstone to gray, granular limestone. Gravel: white and gray chert, white and red quartz; average diameters 0.25-0.5 in (maximum 1.5 in); angular to rounded, mostly subangular; very concentrated locally, elsewhere scattered; locally contains fossills. | |
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, collection 7 ft above base of formation | ||
Database number: | 42700 | ||
Authorizer: | J. Alroy | Enterer: | C. Simpson |
Modifier: | C. Simpson | Research group: | marine invertebrate |
Created: | 2004-08-04 12:38:57 | Last modified: | 2004-08-04 15:38:57 |
Access level: | the public | Released: | 2004-08-04 12:38:57 |
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] |