Geo-chronological context of the open-air Acheulian site at Nahal Hesi, northwestern Negev, Israel

The study indicates that the Middle Pleistocene in the area of the Nahal Hesi site is characterized by lengthy cycles of deposition and erosion of fine-grained sediments associated with the semi-arid Nahal Shiqma drainage system. Marshy sediments could be the result of full or partial blockage of the Shiqma system, probably by coastal dune ridges, that led to formation of standing water bodies during the Middle Pleistocene.