Zaouzaoua Fm
Period:
Paleogene
Age Interval:
Oligocene (3,4)
Province:
Iullemmeden Basin - South Damergou & Koutous, Iullemmeden Basin - Southeast Aïr & Damergou
Type Locality and Naming
References: Faure, 1966, p. 159 & 360; Gavaud, 1975; Fabre et al., 1983.
Equivalent(s): Boulakoura Fm (or "Bella Kora" Fm). The pebbles with oolites caught in a Quaternary ferruginous cuirass of the Zaouzaoua (Damergou) and Boulakoura (Koutous) formations are remnants of the erosion of the Ader Doutchi Formation (Ct1);
Lithology and Thickness
Ferruginous oolite. Conglomerate with limonitic pebbles. 5-10 m thick.
Lithology Pattern:
Aus conglomerate
Relationships and Distribution
Lower contact
Not given
Upper contact
Not given
Regional extent
GeoJSON
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Fossils
Age
Oligocene
Age Span:
Beginning stage:
Rupelian
Fraction up in beginning stage:
0.0
Beginning date (Ma):
33.90
Ending stage:
Chattian
Fraction up in the ending stage:
1.0
Ending date (Ma):
23.04
Depositional setting
Continental
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)