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Ameki Formation

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From Wikipedia, the free encyclopedia
Ameki Formation
Stratigraphic range: Lutetian-Bartonian
TypeGeological formation
Unit ofBende-Ameki Group
Lithology
PrimaryShale
OtherSandstone, siltstone
Location
Coordinates6°00′N 7°00′E / 6.0°N 7.0°E / 6.0; 7.0
Approximate paleocoordinates1°36′N 1°30′E / 1.6°N 1.5°E / 1.6; 1.5
CountryNigeria
ExtentNiger Delta Basin
Type section
Named forAmeki
Ameki Formation is located in Nigeria
Ameki Formation
Ameki Formation (Nigeria)

The Ameki Formation is a Lutetian to Bartonian geological formation located in Nigeria. It belongs to the Bende-Ameki Group, which also consists of two formations namely Nanka Formation, Nsugbe Formation.[1][2]

Fossil content

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Among others, the following fossils have been reported in the formation:[3][4]

Mammals

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Mammals reported from the Ameki Formation
GenusSpeciesPresence MaterialNotesImages
Pappocetus P. lugardi Ombialla District.[5] Mandibles.[5][6] A protocetid.

Reptiles

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Birds

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Birds reported from the Ameki Formation
GenusSpeciesPresence MaterialNotesImages
Gigantornis G. eaglesomei A pelagornithid.

Squamates

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Squamates reported from the Ameki Formation
GenusSpeciesPresence MaterialNotesImages
Pterosphenus Trunk vertebra.[7] A palaeophiid.

Turtles

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Turtles reported from the Ameki Formation
GenusSpeciesPresence MaterialNotesImages
Cosmochelys C. dolloi Ombialla District.[5] Portions of carapace.[5] A dermochelyid.

Invertebrates

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Cephalopods

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Cephalopods reported from the Ameki Formation
GenusSpeciesPresence MaterialNotesImages
Deltoidonautilus D. nwajidei Multiple specimens.[2] A nautiloid.

See also

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References

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  1. ↑ Ogbe, Ovie B.; Osokpor, Jerry (2021-01-01). "Depositional facies, sequence stratigraphy and reservoir potential of the Eocene Nanka Formation of the Ameki Group in Agu-Awka and Umunya, southeast Nigeria". Heliyon. 7 (1) e05846. Bibcode:2021Heliy...705846O. doi:10.1016/j.heliyon.2020.e05846. ISSN 2405-8440. PMC 7820494. PMID 33521344.
  2. 1 2 Odumodu, Chukwuemeka; Nfor, Bruno (January 2012). "A New Paratype of an Eocene Nautiloid From the Ameki Formation, Southeastern Nigeria: Implications for Age and Paleoenvironmental Interpretation". Stratigraphy and Sedimentology of Oil-Gas Basins.
  3. ↑ Ameki at Fossilworks.org
  4. ↑ Port Harcourt at Fossilworks.org
  5. 1 2 3 4 Andrews, C. W. (December 1919). "A Description of New Species of Zeuglodont and of Leathery Turtle from the Eocene of Southern Nigeria". Proceedings of the Zoological Society of London. 89 (3–4): 309–319. doi:10.1111/j.1096-3642.1919.tb02124.x. ISSN 0370-2774.
  6. ↑ McLeod, Samuel A.; Barnes, Lawrence G. (January 1996). "The Systematic Position of Pappocetus Lugardi and a New Taxon From North America (Archaeoceti: Protocetidae)". The Paleontological Society Special Publications. 8: 270. doi:10.1017/S2475262200002720. ISSN 2475-2622.
  7. ↑ Georgalis, Georgios L. (2023-06-19). "First potential occurrence of the large aquatic snake Pterosphenus (Serpentes, Palaeophiidae) from Nigeria, with further documentation of Pterosphenus schweinfurthi from Egypt". Alcheringa: An Australasian Journal of Palaeontology. 47 (3): 327–335. Bibcode:2023Alch...47..327G. doi:10.1080/03115518.2023.2217874. ISSN 0311-5518. S2CID 259422068.

Further reading

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  • Vickers-Rich, Patricia & Rich, Thomas Hewett (1993); Wildlife of Gondwana. Reed. ISBN 0-7301-0315-3
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