Features of the formation of the natural borders of Russia in the context of the development of Siberia in the XVI century

This article discusses the concept of " Russian colonization”, describes the stages of the development of Siberia, and also indicates the characteristic features of the development of Siberian lands. The purpose of the study is to form certain stages of creating the natural borders of Russia. The article reflects the phenomenon of " Russian colonization” and its distinctive features. The scientific novelty of the work consists in a step-by-step review of the colonization process and identification of the characteristic foundations for this process. As a result, the trends of unification of Western and Eastern Russia are identified and formed.