Amamgbala: Maastrichtian, Nigeria
collected by Hazell, Reyment
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella nodosa
Roemer 1841
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Reyment 1955 | ||||||
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Cephalopoda
- Ammonitida
- Sphenodiscidae
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Libycoceras afikpoense
Reyment 1955
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Cephalopoda
- Ammonitida
- Baculitidae
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Baculites cf. asper
Morton 1830
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Bivalvia
- Cardiida
- Arcticidae
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Agelasina plenodonta
Riedel 1933
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Reyment 1955 | ||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia crossensis n. sp.
Reyment 1955
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Reyment 1955 | ||||||
| see common names | |||||||
Geography
| Country: | Nigeria |
| Coordinates: | 5.8° North, 7.9° East (view map) |
| Paleocoordinates: | 4.6° South, 0.9° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Nkporo Shale | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Nkporo Shales. AGE: Maastrichtian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From near the top of the unit. | |||||
Lithology and environment
| Primary lithology: | lithified "shale" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Shale. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | offshore |
| Geology comments: ENVIRONMENT: Presumably an offshore siliciclastic marine facies. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | BMNH |
| Collectors: | Hazell, Reyment |
| Collection method comments: COLLECTOR: J.R.T. Hazell and R.A. Reyment. REPOSITORY: BMNH. | |
| Taxonomic list comments:COVERAGE: Exhaustive for Ammonoidea. NOMENCLATURE: Authoritative publication, but with somewhat antiquated nomenclature. Mostly identified to species resolution. | |
Metadata
| Database number: | 82734 | ||
| Authorizer: | A. Hendy, M. Clapham | Enterer: | A. Hendy, M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2008-07-31 19:35:58 | Last modified: | 2020-05-11 21:49:32 |
| Access level: | the public | Released: | 2008-07-31 19:35:58 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27823. | R. A. Reyment. 1955. The Cretaceous Ammonoidea of southern Nigeria and the southern Cameroons. Geological Survey of Nigeria Bulletin 25:1-112 [A. Hendy/A. Hendy] |
Secondary references:
| 72325 | R. A. Reyment. 1955. Upper Cretaceous Mollusca (Lamellibranchia and Gastropoda) from Nigeria. Colonial Geology and Mineral Resources 5:127-155 [M. Clapham/M. Clapham] |