Ameki Fm: Litho and Fauna - Ostrea Zone: Eocene, Nigeria
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cephalopoda
- Nautilida
- Hercoglossidae
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Deltoidonautilus sp.
Spath 1927
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea sp.
Linnaeus 1758
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Echinoidea
- Clypeasteroida
- Fibulariidae
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Fibularia sp.
Lamarck
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Chondrichthyes
- Myliobatiformes
- Myliobatidae
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Myliobatis sp.
Cuvier 1816
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see common names |
Geography
Country: | Nigeria |
Coordinates: | 5.6° North, 7.6° East (view map) |
Paleocoordinates: | 0.2° South, 1.6° East |
Basis of coordinate: | estimated from map |
Geographic resolution: | local area |
Time
Period: | Paleogene | Epoch: | Eocene |
Key time interval: | Eocene | ||
Age range of interval: | 56.00000 - 33.90000 m.y. ago |
Stratigraphy
Formation: | Ameki | Local bed: | 1 | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: This assemblage zone lies superjacent on the Callianassa-Buliminella-Paracypris assemblage zone and is about 65 m thick. |
Lithology and environment
Primary lithology: | very fine,gray,green poorly lithified calcareous sandstone |
Secondary lithology: | poorly lithified siltstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: Silty to fine grained light grey-green coloured sandstones and siltstones, poorly consolidated, with variable amounts of clay, calcareous, thick bedded structrueless to finely laminated make up the bulk of this unit which is about 117 m thick. | |
Environment: | transition zone/lower shoreface |
Geology comments: intertidal |
Taphonomy
Size of fossils: | macrofossils,mesofossils,microfossils |
Collection methods and comments
Reason for describing collection: | paleoecologic analysis |
Metadata
Also known as: | Lithology and Faunal Composition of the Ostrea assemblage zone, Unit 1, Ameki Formation | ||
Database number: | 46247 | ||
Authorizer: | L. Ivany | Enterer: | P. Wall |
Modifier: | P. Wall | Research group: | marine invertebrate |
Created: | 2005-01-09 11:08:20 | Last modified: | 2005-01-10 10:16:29 |
Access level: | the public | Released: | 2005-01-09 11:08:20 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
12336. | I. Arua and V.R. Rao. 1987. New stratigraphic data on the Eocene Ameki Formation, southeastern Nigeria. Journal of African Earth Sciences 6(4):391-397 [L. Ivany/P. Wall/P. Wall] |