From the Upper Bajocian (Middle Jurassic) onwards radiolarites accumulated in the Alps. The onset of the sedimentation was diachronous but the end in the Lower Tithonian rather abrupt. These alpine radiolarites belong to the Ruhpolding Radiolarite Group (RRG) and are found in the Northern Calcareous Alps and in the Penninic of France and Switzerland (Graubünden). Associated are the radiolarites of Corsica. The radiolarites of the Ligurian Apennines appear somewhat later towards the end of the Jurassic.