Elhanan Harel, Ben-Gurion University of the Negev, Geological & Environmental Sciences, Beer Sheva, Israel, Liran Goren, Ben Gurion University of the Negev, Department of Geological and Environmental Sciences, Beer-Sheva, Israel, Eitan Shelef, University of Pittsburgh, Pittsburgh, PA, United States and Hanan Ginat, Dead-Sea & Arava Science Center, Tamra, Israel