The Organization of Later Stone Age Lithic Technology in the Caledon Valley, Southern Africa.

Paleoclimatic data indicate that the Pleistocene/Holocene transition was a period of considerable ecological change in the Caledon Valley of the southern African interior. Stone artefact assemblages from sites in one part of this region, the Phutiatsana ea Thaba Bosiu (PTB) Basin of western Lesotho, were analyzed in order to investigate whether changes in settlement and subsistence strategies during this period are also reflected in the organization of lithic technologies. It appears that although technological solutions to the problems of subsistence risk may have been emphasized during the late Pleistocene, social means, such as exchange, dominated at the Pleistocene/Holocene boundary. Subsequent innovation or adoption of new formal tool types suggests that both strategies were important from the middle Holocene onwards. [ABSTRACT FROM AUTHOR]