Ameki Formation

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title: "Ameki Formation" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["geologic-formations-of-nigeria", "eocene-series-of-africa", "shale-formations"] description: "Geological formation in Nigeria" topic_path: "philosophy" source: "https://en.wikipedia.org/wiki/Ameki_Formation" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Geological formation in Nigeria ::

::data[format=table title="Infobox rockunit"]

Field	Value
name	Ameki Formation
period	Bartonian
age	Lutetian-Bartonian
type	Geological formation
prilithology	Shale
otherlithology	Sandstone, siltstone
unitof	Bende-Ameki Group
map	{{Location map+
relief	1
width	250
float	center
lat_deg	6.0
lon_deg	7.0
mark	Orange pog.svg
marksize	12
coordinates
paleocoordinates
country	Nigeria
extent	Niger Delta Basin
namedfor	Ameki
::

| name = Ameki Formation | period = Bartonian | age = Lutetian-Bartonian | image = | imagesize = | caption = | type = Geological formation | prilithology = Shale | otherlithology = Sandstone, siltstone | unitof = Bende-Ameki Group | subunits = | underlies = | overlies = | thickness = | area = | map = {{Location map+ | Nigeria | relief = 1 | width = 250 | float = center | places = | lat_deg = 6.0 | lon_deg = 7.0 | mark = Orange pog.svg | marksize = 12 | map_caption = | location = | coordinates = | paleocoordinates = | region = | country = Nigeria | extent = Niger Delta Basin | namedfor = Ameki | namedby = | year_ts = | location_ts = | coordinates_ts = | region_ts = | country_ts = | thickness_ts = 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.

Fossil content

Among others, the following fossils have been reported in the formation:

Mammals

::data[format=table]

Mammals reported from the Ameki Formation	Genus	Species	Presence	Material	Notes	Images
Pappocetus	P. lugardi	last=Andrews	first=C. W.	date=December 1919	title=A Description of New Species of Zeuglodont and of Leathery Turtle from the Eocene of Southern Nigeria	url=https://onlinelibrary.wiley.com/doi/10.1111/j.1096-3642.1919.tb02124.x
::

Reptiles

Birds

::data[format=table]

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

Squamates

::data[format=table]

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

Turtles

::data[format=table]

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

Invertebrates

Cephalopods

::data[format=table]

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

References

References

1. (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.
2. (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. [https://paleobiodb.org/classic/displayCollResults?collection_no=32905 Ameki] at [[Fossilworks]].org
4. [https://paleobiodb.org/classic/displayCollResults?collection_no=32906 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.
6. (January 1996). "The Systematic Position of Pappocetus Lugardi and a New Taxon From North America (Archaeoceti: Protocetidae)". The Paleontological Society Special Publications.
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.

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::