La plate-forme carbonatee du Cenomano-Turonien de la region d'Erfoud-Errachidia (Sud-Est marocain); stratigraphie et paleoenvironnements

Ferrandini, Michelle; Philip, Jean; Babinot, Jean-François; Ferrandini, Jean; Tronchetti, Guy

doi:10.2113/gssgfbull.i.4.559

Cited by 40 publications

(24 citation statements)

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“…In this framework, the Cretaceous transgression affecting large areas east of Tinejdad (e.g. Ferrandini et al. , 1985) was probably confined to the west inside narrow fault‐bound basins (Laville et al.…”

Section: Discussionmentioning

confidence: 99%

Post‐Variscan tectonics in eastern Anti‐Atlas (Morocco)

et al. 2007

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New field data integrated by fission-track (FT) analysis unravel an innovative scenario for the post-Variscan evolution of the eastern Anti-Atlas. This area, unaffected by Meso-Cenozoic tectonics according to most workers, is crosscut by crustal faults bearing evidence of a polyphase deformation history. Apatite FT ages, ranging between 284 and 88 Ma, point to fast Neogene exhumation and unravel contrasting cooling paths across major faults. Results show that the study area was buried beneath 2 km of allochthonous Variscan units, now eroded. The eastern Anti-Atlas acted as the southern shoulder of the Atlasic rift in the Mesozoic, and underwent a dextral transpressional structuring of Neogene age followed by sub-meridian shortening. The southern front of Atlasic deformation is therefore located inside the Anti-Atlas region, and it is still active

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Section: Discussionmentioning

confidence: 99%

Post‐Variscan tectonics in eastern Anti‐Atlas (Morocco)

et al. 2007

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“…Choubert (1952) and Lavocat (1954a), however, assigned the Kem Kem beds to the "infracénomanien," suggesting a probable Albian age. Although ammonites and other nonvertebrate fossils have established the Late Cenomanian-Turonian age of the overlying limestone complex (Ferrandini et al 1985;Ettachfini and Andreu 2004;Ettachfini et al 2005;Essafraoui et al 2015), no fossils were known at that time from the Kem Kem beds that could be reasonably associated with stage-level temporal resolution.…”

Section: Geological Status and Presumed Agementioning

confidence: 99%

“…7), which may be the reason the term has persisted. The limestone platform records a sudden global transgression (Gale 2000) that is well exposed in Morocco (Kilian 1931, Lefranc and Guiraud 1990, Choubert 1948, Lavocat 1954a, Ferrandini et al 1985, Ettachfini and Andreu 2004. The nearshore and terrestrial strata underlying the platform in Morocco correspond with the Djoua series in Algeria, although their precise correlation is poorly constrained.…”

Section: Locality/term Meaning Synonym/variantmentioning

confidence: 99%

“…The carbonate platform was first described in detail by Ferrandini et al (1985: 561, fig. 2) on the basis of a stratotype section at Akrabou (cited as "Akerboûss") approximately 45 km north of Erfoud. Ferrandini et al (1985) and Ferrandini (1988) divided the platform into four successive subunits, the lower three within the Late Cenomanian and the last in the Turonian, with ages based on considerable biostratigraphic evidence. The subunits, which represent successive transgressive facies (coastal, reef, interior platform, and benthic platform), were not formally designated as members.…”

Section: Locality/term Meaning Synonym/variantmentioning

confidence: 99%

“…Morocco is challenging, because of lateral variation in the character and age of platform subunits. Transgressive conditions, nonetheless, characterize all of these sections, which grade upward from shallow-water coastal facies to a more massive, deeper-water (subtidal) carbonate platform (Ferrandini et al 1985). The platform complex also markedly thickens to the north of what Essafraoui et al (2015) identify as the "Kem Kem embayment", on which the fluvio-deltaic Kem Kem beds were deposited.…”

Section: Correlation Between Sections Of the Cenomanian-turonian Platmentioning

confidence: 99%

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Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco

Ibrahim¹,

Sereno²,

Varricchio³

et al. 2020

128

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The geological and paleoenvironmental setting and the vertebrate taxonomy of the fossiliferous, Cenomanian-age deltaic sediments in eastern Morocco, generally referred to as the “Kem Kem beds”, are reviewed. These strata are recognized here as the Kem Kem Group, which is composed of the lower Gara Sbaa and upper Douira formations. Both formations have yielded a similar fossil vertebrate assemblage of predominantly isolated elements pertaining to cartilaginous and bony fishes, turtles, crocodyliforms, pterosaurs, and dinosaurs, as well as invertebrate, plant, and trace fossils. These fossils, now in collections around the world, are reviewed and tabulated. The Kem Kem vertebrate fauna is biased toward large-bodied carnivores including at least four large-bodied non-avian theropods (an abelisaurid, Spinosaurus, Carcharodontosaurus, and Deltadromeus), several large-bodied pterosaurs, and several large crocodyliforms. No comparable modern terrestrial ecosystem exists with similar bias toward large-bodied carnivores. The Kem Kem vertebrate assemblage, currently the best documented association just prior to the onset of the Cenomanian-Turonian marine transgression, captures the taxonomic diversity of a widespread northern African fauna better than any other contemporary assemblage from elsewhere in Africa.

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