In his classification of the organic world (1758), C. Linnaeus distinguished two categories of species, modern and fossil.The time of existence of modern biological species was clear to him. Linnaeus believed that they were contemporary with man and were no more than 20,000 years old ...

All our lives we have been solving geologic problems - big and small, difficult and easy. Many of them we solve successfully - one, another, a third, and we begin to think, we gladly think that someday all geological problems will be solved.

The classic section of the Lower Phamene is considered to be the section of the central regions of the Russian Platform. In it, the Zadonian and Yeletsky layers with numerous representatives of the Cyrtospirifer archiaci Murch group lie on the Upper Nefranian sediments with theodossia, covered by the Dankov-Lebedian layers with C. lebedianicus Nal.

Stratigraphy emerged during the differentiation of historical geology, The classic monographs of F. N. Chernyshev on the Devonian of the Urals, S. N. Nikitin on the Jurassic of the central regions are typical stratigraphic works. True, they were not called stratigraphic at that time. They were geological works connected with the geologic map. Stratigraphy existed as an undifferentiated part of geology, and later as a part of historical geology ...

Геосинклинальные и платформенные комплексы отложений(формации)Геосинклинальные отложения — интенсивно складчатые, метамор- физованные и прорванные синорогенными интрузиями. Обычно они обладают большей мощностью — тысячами метров для системы и даже для отделов системы. Только в геосинклинальных отложениях встре­чаются флишевые и молассовые комплексы, толщи граувакк и аспидных сланцев, мощные рифовые известняки.

A. A. Borisyak all his life was an active fighter for the doctrine of continuous development, the evolution of not only the organic world, but also the inorganic. For him, the earth's crust, with all the infinitely diverse phenomena associated with it, lived, changed and developed, as it lives , the countless world of animals and plants that inhabited and inhabits it changes and develops. A. A. Borisyak did extremely much for Soviet geology. He developed the doctrine of the correlative development of the earth's crust and life on it; he developed and applied the doctrine of geosynclines to the territory of the Soviet Union. Of enormous importance is the introduction into geological and paleontological work of the paleogeographical method and its most important part - the doctrine of facies. These three doctrines - the doctrine of the correlative development of earth and life, the doctrine of geosynclines and the doctrine of facies - underlie most of our work, both theoretical and practical. This is an unforgettable merit of A. A. Borisyak.

According to its geological structure, the Southern Urals can be divided into three parts: western, central and eastern, elongated along strike. The main objective of this essay is to raise a number of general issues - the division of the Southern Urals, continental Devonian deposits, the section diagram and give a brief description of the main facies and horizons of the southwestern Urals. The essay is a preface, an introduction to a number of works related to the five-verst survey of the Urals, carried out by the Geological Committee. These works should be widely developed over the next five years, and their results, of course, will change and supplement the data presented in the essay.