نبذة مختصرة : The assemblages of many Paleolithic sites on the Russian Plain contain large pebbles of various types of stone, which, due to the natural and unmodified forms, rarely become objects of special study. Some of them retain their natural shape, others are slightly artificially modified. In the course of our research, artifacts from several Paleolithic sites in Russia and the Republic of Moldova were subjected to a comprehensive study. Technical-morphological and experimental-traceological studies made it possible to characterize the methods of their manufacture and use. Among the items studied, there is a trapezoidal slab retrieved in the lower layer of the Late Paleolithic stratified site Kamennaya Balka II (the Northern Azov Sea region, Russia). On its surface, use-wear traces were found, which are characteristic of wear traces on tools used to grind plant materials. To verify the results of the traceological analysis, a series of experiments was performed. The wear traces on the working part of the experimental tool turned out to be similar to those found on the original one. The functional identification of the slab from Kamennaya Balka II as a tool for processing plants was also confirmed by the discovery on the working surface of mineralized starch grains. This comprehensive study of an unmodified stone artifact from the Kamennaya Balka II site and its identification as the lower grinding stone indicates the presence of complex foraging strategies among the economic activities of the inhabitants of the site and their successful adaptation to the natural environment in this region.
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