Fig. 1

Regional middle Miocene Paratethyan stratigraphy in comparison with the standard global chronostratigraphy (modified after Śliwiński et al. 2012 and Hilgen et al. 2012, updated by Palcu et al. 2015, 2017) and the occurrence of microfossils-bearing clay intercalation (arrowed) in the Babczyn 2 borehole section. Numbers right of the borehole section indicate the depth (in metres); allochth. g. u. = Autochthonous gypsum unit