The Ice Age period lake at Jubba, found in the southern Nafud of Saudi Arabia, has been protected from the encroaching sands of the Nafud by massive sandstone outcrops. It is on these that the breath-taking rock art has been found. The lake itself still produces water from springs and wells. C-14 dating of selected sediments from the fossil lake has confirmed a sixth millennium B.C. occupation along the lake fringes. Earlier dates stretch back into the Late Pleistocene.