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Tibaradine Formation
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Tibaradine Fm base reconstruction

Tibaradine Fm

Period: 
Carboniferous

Age Interval: 
Tournaisian


Province: 
Reggane Basin

Type Locality and Naming

It is also known as Gres de Tibaradine. Its Type Locality is Tibaradine, while the Type Section is in W-flank of Tibaradine anticline (Wendt et al., 2008).

Synonym: Grès de Tibaradine Fm.

References: Wendt et al., 2008; Perron et al., 2018.


Lithology and Thickness

The Tibaradine Fm is dominated by cross-bedded sandstones with thin shale and siltstone intercalations. The sandstones exhibit a distinct cyclicity consisting of meter thick shallowing-upward units. Frequent ball-and-pillow and dewatering structures (convolute bedding) indicate a very rapid sedimentation. Thicknesses are highest in the central Ahnet (210 m at the type locality, 190 m at Tirechchoumine) and decrease towards the west (in the Reganne Basin) (Wendt et al., 2008; Perron et al., 2018).


Lithology Pattern: 
Sandstone


Relationships and Distribution

Lower contact

It conformably overlies the Argiles de Teguentour Fm.

Upper contact

It is conformably overlain by the Lower Tirechoumine Fm.

Regional extent

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


GeoJSON

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Fossils

Conodonts and ammonoids.


Age 

Upper Tournaisian

Age Span: 

    Beginning stage: 
Tournaisian

    Fraction up in beginning stage: 
0.7

    Beginning date (Ma): 
350.50

    Ending stage: 
Tournaisian

    Fraction up in the ending stage: 
0.9

    Ending date (Ma):  
347.99

Depositional setting

Fluvial, deltaic, neritic (Wendt et al., 2008).


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.