The stratovolcano Opala with an edifice base diameter of 11 km is located in the northern part of a 15x15 km caldera formed on top of an ancient shield-like structure. Opala crater is filled with lava, lava flows are well expressed on the southeastern slope in the near-top part of the volcano. At the southeastern foot of the volcano there is the newest explosive funnel 2x2.5 km in size - the Barany Amphitheater. The funnel is filled with an extrusive dome of rhyolite composition 1 km in diameter.
References
Кожемяка Н.Н., Важеевская А.А., Зубин М.И. Вулкан Опала / Действующие вулканы Камчатки. В 2-х т. Т. 2. М.: Наука. 1991. С. 282-291. Мелекесцев И.В., Фелицын С.Б., Кирьянов В.Ю. Извержение вулкана Опала около 500 г. - крупнейшее эксплозивное извержение нашей эры на Камчатке // Вулканология и сейсмология. 1991. № 1. С. 21-34. |
