During the Epipaleolithic and the Mesolithic, the presence of laminar or geometric microliths serves to date the deposits of different cultural traditions. For instance, in the Atlas Mountains of northwest Africa, the end of the Upper Paleolithic period coincides with the end of the Aterian tradition of producing laminar microliths, and deposits can be dated by the presence or absence of these artifacts. In the Near East, the laminar microliths of the Kebarian culture were superseded by the geometric microliths of the Natufian tradition a little more than 11,000 years ago. This pattern is repeated throughout the Mediterranean basin and across Europe in general.