Stone industries with dominant microblade components are widespread in the Late Paleolithic of Siberia and the Far East. The authors emphasize the role of microblade technology in adaptive processes during the transition period from the Late Pleistocene to the Early Holocene, considering it as a strategy of the minimization of efforts by hunters and the intensifications of hunting. Archeological sites with microblade industries in the Far Eastern region show that they existed over a wide time range - from 24,000-18,000 B.P. up to 10,000-8000 B.P.

There are similar archaeological complexes in the central, east and southwest parts of Primorye. They are located mainly on the banks of the Ussuri - Amur river systems. The existence of microblade complexes in Primorye is traditionally associated with the Early Holocene. For the present time there are three basic groups of sites: 1 - Ilistaya, 2 - Zerkalnaya, 3 – Upper Ilistaya and Arsenyevka, which have been investigated to different degrees. But many questions associated with microblade complexes still exist. Among them are their dating and identification. Long term investigations of Late Paleolithic sites in the Zerkalnaya valley have resulted in the formation of three basic chronological stages of microblade technological development between 18,000 – 10,000 B.P.

Most of the Late Paleolithic artifacts found in the Ilistaya River basin have been found in the white-yellow soft loam layer and the upper part of a heavy reddish-brown one. The spore-pollen spectra from these horizons located in the Molodezhnaya-1 site shows that their formation occurred during a cold climate comparable to landscapes of betula-deciduous light forests on permafrost soil. The spectrum recovered from the whitish loam corresponds to the Partizanskii horizon of the regional scheme of the Pleistocene, with dates of 15,300±140 B.P. and 17,400±150 B.P. The composition of pollen from the upper part of the reddish – brown heavy loam is comparable with a complex from a terrace of the Ilistataya river, with a date of 26,120±280 B.P. These data from new sections of Molodezhnaya-1 provides a foundation for an assumption of the existence of microblade complexes in the Ilistaya River Valley that occurred at different times, and permits us to interpolate a conclusion, based on materials of the series of sites found in the Zerkalnaya River Valley to all the Primorye Region.