“…to the bottom of the borehole, so their exact thickness is not known. According to the available published data, the thickness of these sediments in the area of Ada Ciganlija is approximately 18.0 m, on the left bank of the Sava Ri-ver the thickness decreases, while in the area of Zemun it dramatically increases to more than 100 m (KNEŽEVIĆ et al, 1998;NENADIĆ, 1997NENADIĆ, , 2001NENADIĆ, , 2003NENADIĆ et al, 2009NENADIĆ et al, , 2010NENADIĆ et al, , 2011NENADIĆ et al, , 2015NENADIĆ et al, , 2016NENA-DIĆ & BOGIĆEVIĆ, 2014). Lithologically, the oldest Quaternary deposits in the Sava River valley are composed of heterogeneous gray-brown, gray, brown-reddish clays (mainly greasy and hard), sandy clays, clayey sands, gravelly clays, etc.…”