The Cenomanian–Turonian transition in the carbonate platform facies of the Western Saharan Atlas (Rhoundjaïa Formation, Algeria)

Microfacies, fossil macroinvertebrates and microfossil assemblages (foraminifera and ostracods) and δ13C from the Rhoundjaia Formation (Ksour Mountains, Western Saharan Atlas, Algeria) were studied. During the Late Cenomanian–Early Turonian, the Ksour Basin was an isolated platform at mid to outer shelf depths. The neritic conditions were interrupted by pelagic conditions in transgressive intervals. This deepening of the palaeoenvironment is...