Fig. 3

Simplified stratigraphic log of Bagolino section (GSSP for the base of the Ladinian Stage) with U–Pb-zircon ages (BAG samples; Mundil et al. 1996) and distribution of ammonoid taxa co-occurring in the Ladinian section of Monte San Giorgio (Brack and Rieber 1993; Brack et al. 2005; Schatz 2005). Also shown are the correlatable U–Pb zircon ages (SEC samples; Mundil et al. 1996) and biostratigraphic data on palynomorphs (Hochuli and Roghi 2002; Brühwiler et al. 2007) and daonellids (Schatz 2005) from Seceda, the principal auxiliary section in the Dolomites. The GSSP is defined by the lowest occurrence of the ammonoid Eoprotrachyceras curionii (base of the E. curionii Amm. Zone); it lies at the 63.25-m level of the Bagolino reference column. Ammonoid zonal scheme according to Brack and Rieber (1993), with the Fassanian Substage comprising both the E. curionii and P. gredleri Amm. Zones (Brack et al. 2005). LPV, MPV, UPV Lower, Middle and Upper Pietra Verde intervals respectively