Rancho la Cueva, 183.8-184.4 m above base: Kungurian, Mexico
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Cerithimorpha
- Orthonemidae
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? Cibecuia sp.
Winters 1956
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Gastropoda
- Goniasmatidae
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Goniasma sp.
Tomlin 1930
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Gastropoda
- Orthonematidae
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Orthonema sp.
Meek and Worthen 1862
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Gastropoda
- Bellerophontida
- Bellerophontidae
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Bellerophon sp.
de Montfort 1808
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Gastropoda
- Euomphalina
- Euomphalidae
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Euomphalus ? kaibabensis
Chronic 1952
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Bivalvia
- Nuculida
- Nuculidae
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"Palaeonucula" sp.
Quenstedt 1930
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| Not illustrated but likely Nuculavus | ||||||||||
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Bivalvia
- Ostreida
- Pinnidae
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Aviculopinna sp.
Meek 1864
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Bivalvia
- Trigoniida
- Schizodidae
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Schizodus sp.
King 1844
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Bivalvia
- Carditida
- Astartidae
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Astartella subquadrata
Girty 1909
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| see common names | ||||||||||
Geography
| Country: | Mexico | State/province: | Sonora |
| Coordinates: | 31.2° North, 110.5° West (view map) | ||
| Paleocoordinates: | 5.2° North, 38.1° West | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Cisuralian |
| Stage: | Kungurian | 10 m.y. bin: | Permian 2 |
| Key time interval: | Kungurian | ||
| Age range of interval: | 283.50000 - 273.01000 m.y. ago |
Stratigraphy
| Formation: | Colina |
| Stratigraphic resolution: | group of beds |
Lithology and environment
| Primary lithology: | lithified lime mudstone |
| Includes fossils? | Y |
| Lithology description: medium- to thick-bedded, light-gray lime mudstone | |
| Environment: | shallow subtidal indet. |
| Geology comments: very shallow water environment in an inner carbonate platform setting, with periodic further shallowing represented by the cryptalgal laminations that probably indicate upper intertidal to supratidal conditions | |
Taphonomy
| Modes of preservation: | body,replaced with silica |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | chemical,field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: Repository: Estacion Regional del Noroeste del Instituto de Geologia—UNAM, Hermosillo, Sonora, Mexico (ERNO). | |
Metadata
| Database number: | 52097 | ||
| Authorizer: | T. Olszewski | Enterer: | L. Fall |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2005-07-22 09:34:17 | Last modified: | 2012-07-28 00:35:26 |
| Access level: | the public | Released: | 2005-07-22 09:34:17 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 13977. | R. B. Blodgett, T. E. Moore, and F. Gray. 2002. Stratigraphy and paleontology of Lower Permian rocks north of Cananea, northern Sonora, Mexico. Journal of South American Earth Sciences 15:481-495 [T. Olszewski/L. Fall/P. Wagner] |