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Dans plusieurs synclinaux du Haut Atlas central, les « Couches rouges » succédant à la fermeture du sillon marin atlasique téthysien au cours du Jurassique moyen sont constituées par trois formations ou unités successives de dépôts continentaux ayant fait l’objet de datations biostratigraphiques récentes. Des marqueurs micropaléontologiques, essentiellement des charophytes et des ostracodes, permettent...
Lithology, sedimentology and palaeoenvironments allow a lithostratigraphic subdivision of the Red beds into five formations. A marine episode identified near the top of the first formation is Early Bathonian in age. An erosional unconformity overlies this marine level just below the Lower Cretaceous deposits. It could be related to a large sedimentary gap between the Lower Bathonian and the Lower...
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