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Les Gres de Oued Saret Formation
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Les Gres de Oued Saret Fm base reconstruction

Les Gres de Oued Saret Fm

Period: 
Ordovician

Age Interval: 
Darriwilian – Katian.


Province: 
Ahnet Basin, Mouydir Basin

Type Locality and Naming

Synonym:

References: van Dijk et al., 2019


Lithology and Thickness

The Oued Saret Formation is made up of massive sandstones (van Dijk et al., 2019).


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

It conformably overlies the Les Argiles d’Azzel Tiferouine Fm.

Upper contact

It is unconformably overlain by the Felar Felar/M’Kratta El Golea 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: 
Darriwilian

    Fraction up in beginning stage: 
0.75

    Beginning date (Ma): 
460.99

    Ending stage: 
Katian

    Fraction up in the ending stage: 
0.5

    Ending date (Ma):  
448.98

Depositional setting

Tidal ramp (Perron et al., 2019).


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.