关键词: 石片;背面;白岩脚洞

Abstract: The present article deals with 1220 pieces of stone flakes found in the cave of Baiyanjiao. Puding, Guizhou. According to their striking platforms the flakes can be grouped into 11 categories. The cortex platforms predominate over the artificial ones. The latter is composed of 6 categories, i.e. plain; crested, scarred, prepared (only 0. 4%), punctiform and linear.
Judging from the scars left by the previous flakes, it seems to the author that in most cases the core had been flaked 1 to 2 or more times before the given flake detached from it. More than half the flakes show that the matrix had been flaked from one or more directions different from the present platform.
From the characteristics of the ventral surface, angle of striking platform, size and shape of the flakes it was deduced that they might be produced by the simple direct percussion and occasionally by the bipolar technique.
411 pieces of flakes had been fashioned into implements. Among the retouch types the reversed retouch ( about 40%) predominates over the other types.

Key words: Flakes; Dorsal surface; Cave of Baiyanjiao