Litho- and biostratigraphy, facies patterns and depositional sequences of the Cenomanian-Turonian deposits in the Ksour Mountains (Saharan Atlas, Algeria)

Benyoucef, Madani; Mebarki, Kaddour; Ferré, Bruno; Adaci, Mohammed; Bulot, Luc G.; Desmares, Delphine; Villier, Loïc; Bensalah, Mustapha; Frau, Camille; Ifrim, Christina; Malti, Fatima Zohra

doi:10.1016/j.cretres.2017.05.013

Cited by 41 publications

(11 citation statements)

References 45 publications

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“…It is dominated by shallow-marine palaeoenvironments comprising similar facies and fossil assemblages to Neo-Tethys platform deposits described from Algeria and Tunisia (Busson et al, 1999;Grosheny et al, 2008;Zagrarni et al, 2008;Robaszynski et al, 2010;Grosheny et al, 2013;Reolid et al, 2015;Benyoucef et al, 2016;Benyoucef et al, 2017;Benadla et al, 2018). The absence of Cretaceous strata in most of the High Atlas and Anti Atlas is attributed to post-Cretaceous erosion.…”

Section: Geological Settingmentioning

confidence: 91%

Controls and timing of Cenomanian-Turonian organic enrichment and relationship to the OAE2 event in Morocco, North Africa

Wang

Bulot

Taylor

et al. 2021

Marine and Petroleum Geology

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Section: Geological Settingmentioning

confidence: 91%

Controls and timing of Cenomanian-Turonian organic enrichment and relationship to the OAE2 event in Morocco, North Africa

Wang

Bulot

Taylor

et al. 2021

Marine and Petroleum Geology

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“…The Triassic is generally represented by versicolored clays and evaporites, sporadically interrupted by occasional basaltic lava flows (e.g., Aïn Ouarka diapir). The Lower and Middle Jurassic are characterized by a thick series of limestones (e.g., Breccia Formation of Raknet El Kahla), sandstones and marls accumulated during the Lower and Middle Jurassic (Bassoulet 1973;Mekahli 1996). Above this, silicoclastic deposits (3000 m) mainly continental from the Upper Jurassic to the Lower Cretaceous (Djara, Aissa, Tiloula and Tiout Formations) are established.…”

Section: Geological and Hydrogeological Frameworkmentioning

confidence: 99%

Hydrochemical assessment of groundwater using multivariate statistical methods and water quality indices (WQIs)

Hamma,

Alodah,

Bouaicha

et al. 2024

Appl Water Sci

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Groundwater quality assessment is crucial for the sustainable management of water resources in arid regions, where groundwater is the primary source of water supply and increasing demand raises concerns. The study area in Southwest Algeria relies heavily on groundwater as a source of water supply, and the increasing demand for freshwater raises concerns about the quality of groundwater. To assess the hydrochemical characteristics and water quality of groundwater in the Ain Sefra region, multivariate statistical methods, geochemical modeling and water quality indices were employed. The study revealed that the groundwater samples could be classified into four water groups using hierarchical cluster analysis Q mode (HCA), namely Ca–Mg–HCO3, Ca–Mg–Cl–SO4, Ca–SO4 and Na–Cl. Factor analysis was used to identify the main factors controlling the study area’s hydrochemical processes. The results indicated that water–rock interaction, reverse ion exchange and anthropogenic pollution were the main hydrochemical processes affecting groundwater chemistry. The water quality index indicated that the groundwater was suitable for human consumption, with only 2.32% of the samples being unsuitable. Additionally, the groundwater was suitable for agricultural use, but salinity control was necessary. The saturation index values showed that the groundwater was supersaturated with aragonite, calcite, dolomite, anhydrite and gypsum, and undersaturated with halite. Ca-smectite, Mg-smectite and kaolinite were identified as the primary processes controlling the chemical composition of groundwater. The application of multivariate statistical methods, geochemical modeling and water quality indices provided a comprehensive understanding of the hydrochemical characteristics and water quality of groundwater in the Ain Sefra region. The findings of the study can serve as a useful basis for future studies on groundwater quality assessment in the region.

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“…The Gara Samani Formation would be the coeval deposits of the Djoua series on the Algerian-Libyan borders (Haug, 1904;Lapparent and Lelubre, 1948;Lefranc, 1983;Gabani et al, 2016), of the upper part of the Tiout Formation in the Ksour Mountains (Bassoullet and Iliou, 1967;Benyoucef et al, 2017), and to the "Grès rouges'' Formation outcropping in the lowermost part of the Cretaceous succession of the Guir area (Benyoucef et al, 2014;Benyoucef et al, 2015;Benyoucef et al, 2016). In Northern Africa, outside Algeria, the Gara Samani Formation is correlated to the Ifezouane Formation (Dubar, 1948) in the Errachidia-Boudnib-Erfoud basin and to the Kem Kem beds in Morocco (Sereno et al, 1996;Cavin et al, 2010), to the Aïn el Guettar Formation in Tunisia (Buffetaut and Ouaja, 2002) to the Draa Ubari Formation in Libya (Rage and Cappetta, 2002), and to the Bahariya Formation in Egypt (Said, 1962).…”

Section: Description Of the Gara Samani Formationmentioning

confidence: 99%

The “mid”-Cretaceous (Lower Cenomanian) Continental Vertebrates of Gara Samani, Algeria. Sedimentological Framework and Palaeodiversity

et al. 2022

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Excellent outcrops of the upper part of the “Continental Intercalaire” deposits occur in the Gara Samani area, southern Algeria. These strata are recognised herein as belonging to the Gara Samani Formation, which is composed of the Samani Vertebrate-rich Sand Member, the Samani Sandstone Member and the Méguidène Stratified Sand Member. The first two members are from a fluvial system and the last member corresponds to an aeolian (dune and interdune) system. They have preserved one of the most diverse continental vertebrate faunas of latest Albian–early Cenomanian age yet known from northern Africa. Most of the taxa identified there, cited for the first time for the “mid”-Cretaceous of Algeria, have not been analysed in detail so far; and many of them have never been figured. The faunal list of vertebrates from this locality was supplemented thanks to detailed analysis of new and relatively abundant finds. As a consequence, the Gara Samani vertebrate assemblage is recognised as composed of elasmobranchs (two Hybodontiformes, i.e., Tribodus sp. and Distobatidae indet.; and a Batoidea, Onchopristis numida), actinopterygians (Bawitius sp., Adrianaichthys sp., Obaichthys africanus, and Calamopleurus africanus), sarcopterygians (Mawsoniidae indet. and the Dipnoi, cf. Lavocatodus humei and Neoceratodus africanus), testudines (at least two Pelomedusoides, one of them being a representative of Araripemydidae), crocodyliforms (all remains being compatible with Neosuchia, represented at least by Elosuchus broinae), ornithocheirid pterosaurs, and non-avian dinosaurs (titanosauriform sauropods and at least two theropods, Spinosaurus aegyptiacus and Carcharodontosaurus saharicus). This fauna association displays close similarities to contemporaneous ones from North Africa, especially with that from the Kem Kem beds.

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Litho- and biostratigraphy, facies patterns and depositional sequences of the Cenomanian-Turonian deposits in the Ksour Mountains (Saharan Atlas, Algeria)

Cited by 41 publications

References 45 publications

Controls and timing of Cenomanian-Turonian organic enrichment and relationship to the OAE2 event in Morocco, North Africa

Controls and timing of Cenomanian-Turonian organic enrichment and relationship to the OAE2 event in Morocco, North Africa

Hydrochemical assessment of groundwater using multivariate statistical methods and water quality indices (WQIs)

The “mid”-Cretaceous (Lower Cenomanian) Continental Vertebrates of Gara Samani, Algeria. Sedimentological Framework and Palaeodiversity

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