In the article we consider one of the topical issues of the Paleolithic archeology, the influence degree of the environment on the formation and the change of production technology of stone tools in the various Paleolithic periods. We compare the characteristics of the Paleolithic materials in the Barun-Alan 1 located in the river valley Alan (Western Transbaikalia) with the published data of the location Hotyk stationed ten kilometers to the south. These locations functioned simultaneously and demonstrate the development of cultures from the middle Paleolithic to the final Paleolithic. At the same time, the archaeological materials of these localities are significantly different from each other. Thus, within the same local area with a relatively similar climatic condition the archaeological cultures have evolved differently, and we can conclude that the differences in cultural traditions Paleolithic is not always due to environmental differences.