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Calcaires de Takoula Formation
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Calcaires de Takoula Fm base reconstruction

Calcaires de Takoula Fm

Period: 
Devonian

Age Interval: 
Givetian.


Province: 
Ahnet Basin

Type Locality and Naming

Synonym: Calcaires de Tekoula Fm

References: Perron et al., 2019.


Lithology and Thickness

The Calcaires de Tekoula Fm is made up entirely of limestone (Perron et al., 2019).


Lithology Pattern: 
Limestone


Relationships and Distribution

Lower contact

It conformably overlies the Argiles d’Adrar Morrat Fm.

Upper contact

It is conformably overlain by the Argiles de Mehden Yahya Fm.

Regional extent

75,000 Km2


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[2.24,26.77],[2.5,26.91],[2.65,26.59],[2.84,27],[3.1,26.63],[3.46,26.4],[3.36,26.28],[3.58,25.55],[3.54,24.93],[3.6,24.34],[3.47,24.34],[3.23,24.68],[3.03,24.61],[3.17,23.93],[2.64,23.73],[2.38,23.94],[2.04,24.46],[1.92,25.72],[1.57,26.6],[1.63,27.17],[1.84,27.18],[1.84,27],[2.24,26.77]]]]}}

Fossils


Age 


Age Span: 

    Beginning stage: 
Givetian

    Fraction up in beginning stage: 
0.0

    Beginning date (Ma): 
385.30

    Ending stage: 
Givetian

    Fraction up in the ending stage: 
1.0

    Ending date (Ma):  
378.90

Depositional setting


Depositional pattern:  


Additional Information


Compiler:  

Enam O. Obiosio, Solomon Joshua Avong and Henry Nasir Suleiman (2024) - Stratigraphic Lexicon compiled from the following books:

Wendt J., Kaufmann B., Belka Z., Korn D (2008): Carboniferous Stratigraphy and Depositional Environments in the Ahnet Mouydir Area (Algerian Sahara). In: Facies. DOI 10.1007/s10347-008-0176-y

Wendt J., Kaufmann B., Belka Z., Klug C. & Lubeseder S. (2006): Sedimentary evolution of a Palaeozoic basin and ridge system: the Middle and Upper Devonian of the Ahnet and Mouydir (Algerian Sahara). Geol. Mag. 143 (3) pp. 269–299. doi:10.1017/S0016756806001737

Derder M, E.M., Henry B., Amenna M., Bayou B., Djellit H., Guemache M. A., Hemmi A. (2009): New structural implications for the central Sahara (Algeria), from the revisited Upper Carboniferous “Hassi Bachir” Formation: Paleomagnetic constraints. Tectonophysics, 463: pp.69–76.

Perron P., Guiraud M., Vennin E., Moretti I., Portier E., L. Le Pourhiet, M. Konaté (2018): Influence of basement heterogeneity on the architecture of low subsidence rate Paleozoic intracratonic basins (Reggane, Ahnet, Mouydir and Illizi basins, Hoggar Massif). Solid Earth, 9: pp.1239-1275.