The charophytes-rich Barremian-Albian record in Jebel Ksaïra (Central Tunisia)

Salmouna, Amal; Cojan, Isabelle; Touir, Jamel

doi:10.1016/j.jafrearsci.2017.03.011

Cited by 2 publications

(2 citation statements)

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“…Note that this definition does not coincide with the Aptian-Albian boundary defined by Kennedy et al (2000; Farther Southeast, early to middle Albian times are marked by an emergence period (Burollet 1956;Bismuth et al 1981;Philip et al 1989;Touir et al 2015). However, the early Albian transgression had been recently identified in some sites of central Tunisia (Kebar Fm: Trabelsi et al 2010;Salmouna et al 2017;Houla et al 2017), and in Jebel el Hamra. In the latter location, El Euchi (1993) identified the "Intermediate Series", now dated as early Albian (Latil 2011) (Fig.…”

Section: Geological Setting and Previous Workmentioning

confidence: 93%

“…On the other hand, the marine fauna contained in the Hameima sandstones is not significantly shallower than that of the underlying strata, as should be the case for a LST. Moreover, except very local and sporadic clastic systems (Nasri et al 2017), no coeval significant fluvial system of early Albian age is known farther South and Southeast in the Kebar Formation (Trabelsi et al 2010;Salmouna et al 2017; or in the Chott area (Ben Youssef and Peybernès 1986;Abdallah et al 1995;Hfaied et al 2013), and the karstic cavities in Jebel El Hamra or in Jebel Semmama (Touir et al 2015) are not filled by quartz-rich deposits. Thus, the emergent area was probably not marked by important fluvial systems able to feed the Hameima sandstones.…”

Section: Origin Of the Hameima Sandstonesmentioning

confidence: 99%

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Sequences, discontinuities and water stratification in a low-energy ramp: the Early Albian sedimentation in central Tunisia

Jaillard

Chihaoui

Latil³

et al. 2020

Int J Earth Sci (Geol Rundsch)

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Based on a precise biostratigraphic framework stated previously, the detailed sedimentological study of eight sections of the early Albian succession of Central Tunisia made possible to refine the modalities of the Albian transgression and the related behavior of sedimentary system on the Tunisian margin. Major early Albian transgressive pulses occurred (i) at the base of the L. tardefurcata standard ammonite zone, (ii) around the top of the same zone, (iii) during the D. mammillatum standard zone, and (iv) near the top of the latter ammonite zone. They resulted in the progressive flooding of the Tunisian margin emergent since the Aptian boundary, in the disappearance of emergence evidences through time, in the southward backstepping of the carbonate shelf facies, and eventually in the homogeneization of the outer shelf marly sedimentation in the study area. The low energy of deposition of the early Albian sediments in this part of the South-Tethyan margin may be due to the deflection of winds and storms by the Coriolis forces toward the North-Tethyan margin, creating a clockwise gyre in this part of the ocean. This circulation may have enhanced upwelling currents likely responsible for phosphate mineralization, and for the oxygen depletion of deep waters, which progressively invaded the Tunisian margin, giving way to organic-rich deposits of late early Albian age. The early Albian sedimentation is then interrupted by a major hiatus of middle Albian to early late Albian age.

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Section: Geological Setting and Previous Workmentioning

confidence: 93%