Research interests: Geochemistry and Paleolimnology of Pleistocene lakes in the Dead Sea Transform (with M. Stein, Funded by GIF); Lisan & Amora Fms.; Pleistocene Climate Change; Radioactivity of groundwater and seawater; Uranium series disequilibrium; Ra and Rn in water, especially Gulf of Elat (with Lazar); Three isotopes of oxygen in evaporating waters and in carbonates (with Luz); Geochemistry of cherts; Combustion metamorphism, the Hatrurim Fm.