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Argiles de Temertasset Formation
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Argiles de Temertasset Fm base reconstruction

Argiles de Temertasset Fm

Period: 
Devonian.

Age Interval: 
Famennian.


Province: 
Reggane Basin, Ahnet Basin, Mouydir Basin

Type Locality and Naming

SW Algeria. The formation is well exposed north of Ain Tiouendjiguine, at Ain Behaga, Adrar Morrat and Tes Ereghet (Wendt et al., 2006).

Synonym: Named “Argiles de Khenig” by Conrad (1984). Temertasset Fm.

References: Wendt et al., 2006.


Lithology and Thickness

The Argiles de Temertasset Fm ranges from 500m-1100m in thickness, and is made up of calcareous mudstone characterized by up to five skeletal calcareous packstone layers intercalated in the monotonous shale sequence (Wendt et al., 2006).


Lithology Pattern: 
Shallow-marine marl


Relationships and Distribution

Lower contact

It conformably overlies the Gres de Mehden Yahya Fm.

Upper contact

It is conformably overlain by the Gres de Khenig Fm.

Regional extent

SW Algeria. 75,000 Km2


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

Brachiopods, common pelecypods and orthoconic nautiloids, ostracods, rare bellerophontids and crinoids, and fish remains.


Age 


Age Span: 

    Beginning stage: 
Famennian

    Fraction up in beginning stage: 
0.00

    Beginning date (Ma): 
371.10

    Ending stage: 
Famennian

    Fraction up in the ending stage: 
0.65

    Ending date (Ma):  
363.43

Depositional setting

Short open marine intervals in an otherwise restricted mudflat regime (Wendt et al., 2006).


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.