The brown coal deposits of the Ural-Emben region, known since the last century, did not attract serious attention for a long time. And only in recent years, the growth of local industry in connection with the development of the raw material base of this area forced attention to these deposits. Brown coal deposits of the Ural-Emben region can be a serious energy base that fully meets the needs of a rapidly growing industry, freeing up oil and high-quality coal for their more rational use. In the specifics of geological exploration work in the Ural-Emben region, a major role is played by structural issues, covering, on the one hand, the structure of the entire region with the distribution of these deposits, and on the other hand, the structure of individual deposits, which is related to issues of their volume, quality and conditions of their use. Correct structural analysis of these forms is the main basis for their study and exploration. The present work is the first attempt at such an analysis. Lignite deposits of the Ural-Emben region are still in the initial stages of their study and use. The structural analysis we have given in this work of the entire region and its individual deposits goes towards the upcoming large-scale work of prospecting and exploration of new deposits.
The phenomena of unconformity in the layered structure of the earth's crust have recently acquired great significance as indicators of a break, disruption or complication of the normal course of historical development of the earth's crust, expressed mainly in the conformable accumulation of sedimentary strata. They formed the basis for establishing the epochs of so-called diastrophism, and they are also associated with the determination of the age of folding both in relation to its large periods and smaller phases. In view of such an important fundamental significance of these phenomena, one can ask whether their content is sufficiently clearly and completely defined and how correctly the specific weight of the observed phenomenon of unconformity is determined in geological practice. It should therefore be noted that in the world geological literature the classification of unconformity phenomena is given in too summary a form, which is far from corresponding to the modern level of structural analysis of the earth's crust. In the context of a significant expansion at the present time of our ideas about the movements of the earth's crust and a more in-depth understanding of their historical development, it is necessary to revise this terminology, now undoubtedly outdated, and on the basis of rational classification of these phenomena to provide new terminology for practical work - deciphering sections of the earth's crust.
