Abstract
The stone material from the MNK Chert Factory Site, located in Bed II at Olduvai Gorge, is described and the site is placed within its paleogeographical context. A small proportion of the utilized chert resembles the in situ material, but most of the flaked chert is of nodules from other sources, most of which were probably not far distant. An attribute analysis was performed on a sample of the whole flakes at the factory site and on the chert whole flakes from disturbed living sites at HWK East (Levels 3 and 4), approximately 1.3 km. to the east. The results suggest that there was selection for a certain type of chert flake at HWK E and that these flakes were most likely produced at a factory site such as MNK CFS and were then transported to the living sites for use. In terms of human behaviour these results suggest that at around 1–6 million years ago man was planning ahead a relatively complex sequence of activities in his use of stone tools.