Pyroclastic rocks in deposits of the potassic subformation of the Pripyat intracontinental palaeorift

The paper presents characteristics of composition, structure and distribution pattern of tuffaceous interbeds of the Mid-Late-Famennian potassic subformation of the Pripyat intracontinental palaeorift (the Pripyat Trough, Belarus). Solid products of volcanic activity found there are proofs of significant volcanism influence/contribution on/to accumulation of salt deposits in the Pripyat Trough. Abundance of clastic material, its granulometric and mineralogical composition and distribu- tion within the sedimentary area affected formation of lithological complexes. Interbeds of tuffaceous clays, occurring at 12 levels of the potassic subformation, suggest that the salt accumulation was ac- companied with the volcanic processes. Pyroclastic rocks are represented by ash particles (morpho- logically well-preserved in some crystal-vitric tuffs), pumice, mineral crystals and lithoclasts.