Tamaské, Tahoua (Paleocene of Niger)

Where: Niger (14.8° N, 5.7° W: paleocoordinates 8.3° N, 10.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Kalambaina Formation, Thanetian (59.2 - 56.0 Ma)

• STRATIGRAPHIC RELATIONS: From unknown lithostratigraphic unit, later included within the Kalambaina Formation (Reyment, 1966). AGE: Initially middle Eocene (Lutetian) and later Early Eocene. According to Reyment (1966), the microfaunas indicate that the unit is entirely of Paleocene age. The age. The ostracode fauna is similar to that of the Ewekoro Formation of southern Nigeria, which is of late Paleocene (Thanetian, Montian) age. STRATIGRAPHIC POSITION: From unknown position in local section.

• bed-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified limestone

• ENVIRONMENT: According to Bassey & Eminue (2014), in NW Nigeria, skeletal fragments of mainly gastropods and ostracods show that the sediment was deposited in a shallow water environment, probably as subtidal-lagoonal facies. The presence of ooids shows these particles have been agitated and transported by strong current, indicating a high kinetic energy in the deposition environment.
• SPECIFIC LITHOLOGY: Highly fossiliferous marl with limestone nodules, and some very argillaceous parts, according to Petters (1978). In Toyin et al. (2016): The rocks of Kalambaina limestones comprise pelmicrite, bioclastic wackestone, packstone, biomicrite, algae wackestone and bioclastic packstone carbonate microfacies. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTOR: Not stated in text. REPOSITORY: Ecole des Mines, Paris (now at Université Claude-Bernard, Lyon).

Primary reference: A. K. Miller. 1951. Tertiary nautiloids of west-coastal Africa. Annales du Museé du Congo Belge Tervuren, Sciences Géologiques 8:1-88 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 83985: authorized by Austin Hendy, entered by Austin Hendy on 13.09.2008, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to specimens informally mentioned in text. NOMENCLATURE: Authoritative publication, with somewhat antiquated nomenclature, though identified to species resolution.
Gastropoda
 Neogastropoda - Volutidae
"Eovasum soudanense n. sp." = Lyrischapa soudanense
"Eovasum soudanense n. sp." = Lyrischapa soudanense Douville 1920 volute
Cephalopoda
 Nautilida - Hercoglossidae
Deltoidonautilus molli Douvillé 1920 nautiloid