“…Frequently, doline distribution follows discontinuity systems in the evaporites (Madonia & Forti, 2003;Parise & Trocino, 2005;Zini et al, 2015a). In some areas of Sicily and Calabria, chains of aligned point- recharge dolines, formed as a consequence of an upstream migration of the swallets of small blind valleys, follow the pattern of old fluvial networks that developed on the impervious cover (Agnesi & Macaluso, 1989;Sauro, 1996;Ferrarese & Sauro, 2001;Parise & Trocino, 2005). Dolines are often grouped in welldefined karst units, where they occupy the entire karst area to form a honeycomb pattern, as in the Santa Ninfa area (Sicily) (Agnesi & Macaluso, 1989;Sauro, 1996Sauro, , 2003b.…”