Ameki Eocene SE Nigeria Lithofacies D (Eocene of Nigeria)

Where: Imo, Nigeria (6.8° N, 7.1° E: paleocoordinates 1.1° N, 1.2° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Ameki Formation, Eocene (56.0 - 33.9 Ma)

• The Ameki Formation consists of five lithofacies: (A) clay-shale and limstone facies, (B) silty sandstone facies, (C) bioturbated sandstone facies, (D) mudrock facies, and (E) shelly shale facies. This collection includes fossils from samples N17 and N18 of lithofacies D.

• member-level stratigraphic resolution

Environment/lithology: marine; mudstone

• Paleoenvironmental interpretations listed include a mud and silt substrate in warm shallow normal marine to brackish waters that are well oxygenated and locally anoxic.

Size classes: macrofossils, mesofossils, microfossils

Primary reference: I. Arua. 1988. Paleoecology of the Eocene Ameki Formation of southeastern Nigeria. Journal of African Earth Sciences 7(7/8):925-932 [L. Ivany/C. Visaggi/C. Visaggi]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 42654: authorized by Linda Ivany, entered by Christy Visaggi on 03.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Taxonomic list compiled from tables and text.
Show authors, comments, and common names
unclassified
  -
Cancellaridae indet., Caritidae indet.
Foraminifera
 Discorbacea - Bagginidae
Cancris sp.
Cancris sp. Monfort 1808
 Globigerinoidea - Globigerinidae
Globigerina sp.
Globigerina sp. d'Orbigny 1826
Tubothalamea
 Miliolida - Hauerinidae
Quinqueloculina sp.
Quinqueloculina sp. d'Orbigny 1826
Globothalamea
 Rotaliida - Nonionidae
Nonion sp.
Nonion sp. Monfort 1808
 Rotaliida - Discorbidae
Eponides sp.
Eponides sp. Montfort 1808
Echinoidea
 Clypeasteroida - Fibulariidae
Fibulariidae indet.
Fibulariidae indet. Gray 1855 sand dollar
Bivalvia
 Nuculanida - Nuculanidae
Nuculanidae indet.
Nuculanidae indet. Adams and Adams 1858 pointed nut clam
Gastropoda
 Cerithioidea - Turritellidae
Turritellidae indet.
Turritellidae indet. Lovén 1847 turret shell
 Sorbeoconcha - Strombidae
Strombidae indet.
Strombidae indet. Rafinesque 1815 true conch
 Neogastropoda - Volutidae
Volutidae indet.
Volutidae indet. Rafinesque 1815 volute
 Neogastropoda - Olividae
Olividae indet.
Olividae indet. Latreille 1825 olive snail
Ostracoda
 Podocopida - Candonidae
Paracypris sp.
Paracypris sp. Sars 1866 ostracod
 Podocopida - Trachyleberididae
Costa sp., Buntonia sp., Togoina sp.
Costa sp. ostracod
Buntonia sp. Howe 1935 ostracod
Togoina sp. ostracod
 Platycopida - Cytherellidae
Cytherella sp.
Cytherella sp. Jones 1849 ostracod