THE GEOGRAPHICAL APPROACH TO TYPOLOGICAL CLASSIFICATION OF THE KARST
The authors develop geographical approach to typological classification of the present karst in Russia and neighbouring countries. It is based on the proper comparative geography investigations of the karst regions, as well as analyzing original scientific works. The classification is founded on two factors: the lithological composition of the karst layers and the climate conditions. In the research, karst is typologically classified according to the following hierarchical scale: class - subclass - type group - type.