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Les Argiles d’Azzel Tiferouine Formation
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Les Argiles d’Azzel Tiferouine Fm base reconstruction

Les Argiles d’Azzel Tiferouine Fm

Period: 
Ordovician

Age Interval: 
Dapingian – Darriwilian.


Province: 
Ahnet Basin, Mouydir Basin

Type Locality and Naming

Synonym: Azzel Tiferouine Fm

References: van Djik et al., 2019


Lithology and Thickness

Les Argiles d’Azzel Tiferouine Fm is made up of shales, and it is laterally equivalent to the uppermost Les Gres Fm and the basal In Tahouite Fm of the Reggane Basin (van Dijk et al., 2019).


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

It unconformably overlies the Les Gres de Ouargla Fm.

Upper contact

It is conformably overlain by the Les Gres de Oued Saret Fm.

Regional extent

75,000 Km2


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[-0.96,26.84],[1.04,27.54],[2.69,28.22],[5,28.22],[5.81,27.21],[5.81,26.5],[5.13,25.47],[4.05,24.96],[3.51,24.55],[2.83,23.98],[2.29,23.89],[1.42,23.98],[0.66,25.06],[0.12,25.88],[-0.96,26.84]]]]}}

Fossils


Age 


Age Span: 

    Beginning stage: 
Dapingian

    Fraction up in beginning stage: 
0.5

    Beginning date (Ma): 
470.34

    Ending stage: 
Darriwilian

    Fraction up in the ending stage: 
0.75

    Ending date (Ma):  
460.99

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.