GEOLOGICAL-STRUCTURAL-GEOCHEMICAL FEATURES OF OIL SHALE AND HYDROCARBON DEPOSITS FORMATION OF BOLTYSH IMPACT STRUCTURE by Bahriy, I.D., Pochtarenko, V.I., Dubosarskyi, V.R., Yantsevych, O.O., Semenyuk, V.G., Hryha, N.V, Malyshev, O.N., Gaphych, I.P.