On the regionalization of karst in the Perm region and the forland of the Urals

Abstract

After having reviewed various schemes of regional subdivision of karst in the Permian Pre-Ural region and adjacent Ural Mountains as developed by different researchers, the author introduces a scheme of his own. It is distinguished for several features: it strictly follows the hierarchy of natural factors which controls the karst development, it takes more fully into account the environmental characteristics when delimiting territorial units; it applies morphological and morphometric characteristics of the surficial karst landforms to the regionalization.