Ameki Formation

Ameki Formation
Stratigraphic range: Lutetian-Bartonian
Type	Geological formation
Unit of	Bende-Ameki Group
Lithology
Primary	Shale
Other	Sandstone, siltstone
Location
Coordinates	6°00′N7°00′E / 6.0°N 7.0°E / 6.0; 7.0
Approximate paleocoordinates	1°36′N1°30′E / 1.6°N 1.5°E / 1.6; 1.5
Country	Nigeria
Extent	Niger Delta Basin
Type section
Named for	Ameki
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

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

Mammals

Mammals reported from the Ameki Formation
Genus	Species	Presence	Material	Notes	Images
Pappocetus	P. lugardi	Ombialla District. [5]	Mandibles. [5] [6]	A protocetid.

Reptiles

Birds

Birds reported from the Ameki Formation
Genus	Species	Presence	Material	Notes	Images
Gigantornis	G. eaglesomei			A pelagornithid.

Squamates

Squamates reported from the Ameki Formation
Genus	Species	Presence	Material	Notes	Images
Pterosphenus			Trunk vertebra. [7]	A palaeophiid.

Turtles

Turtles reported from the Ameki Formation
Genus	Species	Presence	Material	Notes	Images
Cosmochelys	C. dolloi	Ombialla District. [5]	Portions of carapace. [5]	A dermochelyid.

Invertebrates

Cephalopods

Cephalopods reported from the Ameki Formation
Genus	Species	Presence	Material	Notes	Images
Deltoidonautilus	D. nwajidei		Multiple specimens. [2]	A nautiloid.

See also

• List of fossil sites

References

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. 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. 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

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