Adams Calendar aka Enkis Calendar
In the 1970s, archaeologists began looking for South Africa's ancient mines. Extensive mining areas were discovered in Swaziland and other sites. Some shafts were up to 50 feet deep. Stone objects and charcoal remains date to 5,000, 46,000, and 60,000 B.C. Scientist now believe that mining technology was used in Southern Africa before 100,000 B.C.