Fig. 1

The main geological units of the Vardar-Tethyan mega-suture (Cvetković et al. 2016a) and neighbouring areas after Schmid et al (2008). The following two study areas are marked by rectangles: The wide area of Rudnik Mts. (see Fig. 2) with Late Cretaceous and Oligocene-Miocene sampling localities/sites and the area of Kopaonik Mts. (Fig. 3) with Oligocene sampling localities/sites. The inset shows the place of the Vardar zone in the Carpatho-Balkan region with sampling areas indicated (red boxes)