Ameki Railway - Cutting #2, southern Nigeria (Eocene of Nigeria)

Also known as Cutting #2

Where: Nigeria (5.0° N, 7.5° E: paleocoordinates 0.7° S, 1.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ameki Formation (Bende-Ameki Group), Lutetian (47.8 - 41.3 Ma)

• Cutting #2. No stratigraphic value can be assigned to cutting numbering. Collections presumably originate from the Ameki Fm (not stated in text, but highly likely based on age and geography). Newton states an upper Lutetian age. This has not be confirmed against publications of Arua and other Ameke Fm collections DO NOT state an age finer than "Eocene". This needs to be rectified as these will be orphaned in current binning scheme. Uhen's Ameki Fm collections state "Middle Eocene", which while encompassing the Lutetian will also be orphaned.

• bed-level stratigraphic resolution

Environment/lithology: estuary or bay; poorly lithified, concretionary, carbonaceous shale and concretionary, carbonaceous claystone

• Described as estuarine facies
• Facies may include: estuarine shales, clays and marls, with septarian nodules and pieces of coal and resin.

Size class: macrofossils

Collection methods: Collected by Sir Frederick Lugard, Sir J. Eaglesome, A. Kitson, W. Bell over several occasions, but with consistency in original of collections.

Primary reference: R. B. Newton. 1922. Eocene Mollusca from Nigeria. Geological Survey of Nigeria Bulletin 3 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51238: authorized by Austin Hendy, entered by Austin Hendy on 01.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Obviously contains antiquated taxonomy. Will vett taxonomy according to that presented by Arua et al. (1987, 1988, 1989) - A. Hendy.
Gastropoda
 Sorbeoconcha - Rostellariidae
"Rostellaria unidigitata" = Cyrtulotibia unidigitata
"Rostellaria unidigitata" = Cyrtulotibia unidigitata Newton 1922 snail
Bivalvia
 Arcida - Arcidae
"Anadara nigeriensis" = Protonoetia nigeriensis Newton 1922 clam
Fossularca africana Newton 1922 ark
 Cardiida - Veneridae
Callista kitsoni Newton 1922 venus clam
 Pholadida - Corbulidae
"Corbula rugosa" = Notocorbula rugosa
"Corbula rugosa" = Notocorbula rugosa Lamarck 1806 clam
 Lucinida - Lucinidae
Phacoides eaglesomei Newton 1922 clam
 Carditida - Carditidae
Cardita costaenodulosis Newton 1922 clam
Trivelina sphenarium
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