Evidence exists of human habitation in the area now known as Venezuela from about 15,000 years ago. Leaf-shaped tools from this period, together with chopping and plano-convex scraping implements, have been found exposed on the high riverine terraces of the Rio Pedregal in western Venezuela. Late Pleistocene hunting artifacts, including spear tips, have been found at a similar series of sites in northwestern Venezuela known as "El Jobo"; according to radiocarbon dating, these date from 13,000 to 7,000 BC.