A stratigraphic revision of the Upper Ordovician from the Montagne Noire and Mouthoumet is made.
Volcanism, unconformably overlying the Sardic gap, point to continental tholeiitic signature.
Continental fracturing controlled the onset of rift branches postdating the Sardic phase.
Sealing of the subaerial Sardic palaeorelief is related to Silurian and Devonian transgressions.