North African Cretaceous Carbonate Platform Systems by R. W. Scott (auth.), Eulà lia Gili, Mohamed El Hédi Negra,

By R. W. Scott (auth.), Eulà lia Gili, Mohamed El Hédi Negra, Peter W. Skelton (eds.)

The final themes coated comprise glossy tools of chemo- and biostratigraphical correlation of platform successions, version within the nature of platform facies with appreciate to climatic, oceanic and palaeographic settings, and the palaeoecology and evolution of rudist bivalves.
A key resource for these engaged on Cretaceous stratigraphy, palaeogeography and palaeoclimatology, and Tethyan biotas, in addition to petroleum geologists enthusiastic about the sector.

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Khanguet Besbessa Sghira, 6. Jabal Naimia, 7. Wadi Bou Jarra, 8. Wadi Berda, 9. Kef Edi Chogga, 10. Jabal Ben Younes, 11. Jabal Senunama (inset map); Distribution of ernplacements of basins at the Cenomanian-Turonian boundary (Basins of Gafsa-Metlaoui, Mansour, Zammour, Ml~jel Bel Abbes, Oum El Arals, and Gharsa), and of high sectors (Highs of Jabal Belkhir, Jabal Chemsi, Jabal Ben Younes, Kef Edi Chogga, and the northern range of the Chotts), after Abdallah [2]. The insect map shows the position of the study area in Tunisia and the location of Jabal Senunama section (11).

The Maximum Flooding Surface separates the Bahloul deposits from those of the Gattar Formation. It represents the last transgressive surface, and marks a sharp drop in the pelagic communities, organic matter content and also in the lamination of deposits. In contrast, a substantial increase of the benthonic communities is recorded (rudists, gastropods, echinoids, other bivalves, foraminifers), occurs with the appearance of bioclastic sedimentation, huge prograding (forestepping pattern in Christie-B1ick [26]) oblique bedding and very thick-massive beds.

Bou Jarra (7) o Subsidence 5km 't. J. Berda (8) N/SE GAFSA-METLAOUI BASIN Nodular limestone Clays/Marls ~ \I (9). {IO) J. Ben Younes N - -,.. ,_ M. BEL ABBES BASIN NW/S K. Ech Chogga r;m Oblique beddings ~ Dissolution cavitie Km Debris flow §;J Prograding bodies @2] ~ 40km ~ Gattar Platform Figure 3. Depositional model and facies cross-section I Upper Cenomanian-Lower Turonian strata of the Gattar carbonate platform around the Gafsa-Metlaoui basin . (3), (7) numbers of sections in Figure 1. (Modified after Abdallah et al.

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