A.N. Rogozin

Institute of Volcanology and Seismology FEB RAS,
Petropavlovsk-Kamchatsky, 683006, e-mail: rogozin@kscnet.ru

This paper presents new data on acid (rhyodacite-rhyolite) volcanism in the territory of the Banno-Karymshinskii area. Extrusions and acid flows of the studied area were plotted on the map. It is established, that the extrusions are limited to resurgent cauldron and to the boundaries of the Karymshina caldera. The sizes of individual extrusion bodies and thickness of lava flows were detected. Volumes of acid extrusions were estimated using initial parameters.