THE LARGEST KARST CAVES AND SHAFTS OF THE USSR

Increased speleological activity in the last 20 years has led to the discovery of 5,000 karst caves and shafts, concentrated mainly in the Caucasus, the Crimea and the Gissar-Alay mountain system of Soviet Central Asia. The largest caves and deepest shafts of the USSR are identified, and their basic characteristics are listed. The author discusses the position of portals, the character of the watersheds feeding the undergound streams, the morphology of the cavities, the rate of flow of underground streams, the chemical composition of the water, and the mutual arrangement of karst cavities.