Fig. 1

a Overview of the central and western Southern Alps showing the location of the Bagolino reference section in eastern Lombardy as well as the map of b. b Distribution of carbonate platforms and basins in the central and western Dolomites during the late Anisian—early Ladinian. c Chronostratigraphic scheme for upper Anisian to Ladinian formations in eastern Lombardy (Bagolino) and in the northwestern Dolomites (modified after Storck et al. 2019). The white bar in the Bagolino column marks the stratigraphic interval shown in Fig. 2. The stratigraphic positions of key ammonoids at Latemar and in the basinal successions are indicated (Lat: Latemarites latemarensis, Hal: Halilucites rusticus, Chd: Chieseiceras dolomiticum)