Petrographic features of ignimbrites and pumice tuffs Mutnovskaya-Gorelovskaya group volcanoes of Kamchatka

The paper considers the mineralogy, petrography pumice tuffs and ignimbrites Mutnovsko-Gorelovskaya group of volcanoes. Carried out mineralogical and petrographic studies have shown that the pumice tuffs were formed as a result of the Gorely volcano, as well as contribute to the evaluation of the degree of volcanic hazards arising during such eruptions.