Spatial distribution of the study polygons on the geological map of the Republic of Croatia M 1: 300.000 (HGI, 2009) – for more information see the papers by BOSTJANČIĆ et al. – polygon 1, FILIPOVIĆ et al. – polygon 2, FRANGEN et al. – polygon 3, GULAM et al. – polygon 4, PODOLSZKI et al. – polygon 5 and POLLAK et al. – polygon 6 (this Vol.)