This age is divided into a group of civilization ages each named after the place where a concentration of habitation was uncovered such as Naqqada in Qena, Badari and Dier Tasa in Asyut. This corresponds to the last stage of the Upper Paleolithic Age. The majority of the uncovered archaeological sites of this period came from Upper Egypt because the Nile silt in Lower Egypt was much thicker which resulted in the loss of such sites.