Tchinezogue Fm
Period:
Carboniferous
Age Interval:
Carboniferous (Mississippian – Serpukhovian) (1)
Province:
Iullemmeden Basin - Tim Mersoï Sub-basin
Type Locality and Naming
Geologists of PNC (a company exploring/producing uranium). Group/Subgroup: Lower Tagora Gr
References: Fabre et al., 1983; Coquel et al., 1995; Billon et al., 2016.
Synonym: “Formation du Blanchâtre”; “Argilo-gréseux de Tchinezogue”
Lithology and Thickness
Argillaceous facies. Coquel et al. (1995) mention two Members for the Tchinezogue Fm. They are: “Unité Gris-Bleu” at the base and “Unité Blanchâtre” on top. Thickness is about 50 m.
Lithology Pattern:
Sandy claystone
Relationships and Distribution
Lower contact
Underlain by the Guezouman Fm
Upper contact
Overlain by the Tarat Fm
Regional extent
GeoJSON
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Fossils
Lamellibranchs, lingules, brachiopods, bryozoans and polyps have been reported in the Tchinezogue Fm claystone.
Age
Carboniferous (Mississippian – Serpukhovian)
Age Span:
Beginning stage:
Serpukhovian
Fraction up in beginning stage:
0.1
Beginning date (Ma):
329.65
Ending stage:
Serpukhovian
Fraction up in the ending stage:
0.75
Ending date (Ma):
325.14
Depositional setting
Fluvio-deltaic, formed during a marine transgression event.
Depositional pattern:
Additional Information
Compiler:
Jacques LeBlanc (2022), Stratigraphic Lexicon: The Sedimentary Formations of The Republic of Niger, Africa. Colnes Publishing (Tallin, Estonia), 365 pp. https://doi.org/10.47909/978-9916-9760-6-7 (or via https://sites.google.com/site/leblancjacques)