Fig. 2From: Scleractinian corals from the Lower Cretaceous of the Alpstein area (Anthozoa; Vitznau Marl; lower Valanginian) and a preliminary comparison with contemporaneous coral assemblagesTime–space diagram of the sedimentary succession of the upper Berriasian to lower Valanginian in the Helvetic Alps. The space axis represents approximately 30 km in its totality (modified from Föllmi et al., 2007). Ls = limestone; Mb = member; Fm = formationBack to article page