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Argiles de Teguentour Formation
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Argiles de Teguentour Fm base reconstruction

Argiles de Teguentour Fm

Period: 
Carboniferous

Age Interval: 
Tournaisian


Province: 
Reggane Basin, Ahnet Basin, Mouydir Basin

Type Locality and Naming

SW Algeria. It is exposed at Jebel Azaz where a basal crinoidal limestone layer was used to assign Late Tournaisian age to the base of the formation (Wendt et al., 2006, 2008).

Synonym: Teguentour Fm.

References: Wendt et al., 2006; Wendt et al., 2008.


Lithology and Thickness

The Argiles de Teguentour Formation is predominantly claystone with rare layers of calcareous nodules in the lower part, and some thin intercalations of fine-grained (0.2 mm) sandstone higher up in the sequence (Wendt et al., 2008).


Lithology Pattern: 
Claystone


Relationships and Distribution

Lower contact

It conformably overlies the Gres de Khenig Fm.

Upper contact

It is conformably overlain by the Argiles de Tibaradine Fm.

Regional extent

SW Algeria. 75,000 Km2. Present in the Reganne, Ahnet, and Muydir Basins.


GeoJSON

{"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[-3.19,27.27],[-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],[-0.15,24.45],[-1.78,24.49],[-2.78,25.16],[-3.81,26.27],[-3.19,27.27]]]]}}

Fossils

Ammonoids, conodonts, brachiopods, bivalves, gastropods, trilobites, and rugose corals.


Age 


Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.2

    Beginning date (Ma): 
356.79

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
0.7

    Ending date (Ma):  
350.50

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.