Ameki Formation

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′N 7°00′E / 6.0°N 7.0°E
Approximate paleocoordinates	1°36′N 1°30′E / 1.6°N 1.5°E
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 edit

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

Mammals edit

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

Reptiles edit

Birds edit

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

Squamates edit

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

Turtles edit

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 edit

Cephalopods edit

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

References edit

^ 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. doi:10.1016/j.heliyon.2020.e05846. ISSN 2405-8440. PMC 7820494. PMID 33521344.
^ ^a ^b 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.
^ Ameki at Fossilworks.org
^ Port Harcourt at Fossilworks.org
^ ^a ^b ^c ^d 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.
^ 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.
^ 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. doi:10.1080/03115518.2023.2217874. ISSN 0311-5518. S2CID 259422068.