THE THEORY ASPECT OF THE SILURIAN EMERSIVE FRONTIER OF SOUTH CIS-TYMAN
To denote the time and facies boundaries of the emersive phase, the concept of the emersive frontier is introduced by analogy with the term mineralogical frontier. The most important is the emersive frontier before the beginning of transgression. It is clearly distinguished in the stratigraphy of sedimentary deposits. The end of the early Paleozoic emersive phase occurred at the beginning of the Silurian transgressive cycle, and is therefore called the Silurian emersive frontier.