Abstract: Based on the technological progress, the improvements of the software packages and multi-electrodemeasuring systems have enabled to perform the Electrical Resistivity Tomography (ERT) measurementsmore widely, faster and more reliable in various disciplines of earth sciences. Herein, some recent casestudy examples performed by ERT technique for uncommon-purposes such as investigation of coastalenvirons are presented.Imaging the lower parts of the beach and dune sands (or other covering units) of layered coastal deposits,which were cemented with calcium carbonate after the development by the control of wave, current andwind, and also the buried geological structures and fossil topographies covered by those beach and dunesands, shows significant contribution of ERT technique on the investigations of coastal geology and paleogeography. Thus some case studies, which have been performed in Black Sea (Şile, Karaburun, Kıyıköy)and Aegean Sea (Bozcaada Island) coasts, and their findings were presented here.The depositional characteristics, subsurface geometry and contact relations of those fossil coastal depositscemented on different geological periods from Late Pleistocene to Late Holocene provide noteworthycontributions in understanding regarding sea level changes, paleo-wind and current dynamics. Thederived-ERT images obtained from the field studies yielded key information about the depositional natureof the deeper parts of the studied layers.