The steep-sided Kamen stratovolcano lies at the center of a N-S-trending chain of volcanoes, flanked by Bezymianny (left) and Kliuchevskoi. The sharp-peaked, 4585-m-high Kamen is Kamchatka's second highest volcano, topped only by its neighbor Kliuchevskoi. Kamen formed during the late Pleistocene, but activity continued into the Holocene. A major slope failure about 1200-1300 years ago removed much of the eastern side of the volcano, leaving the steep escarpment seen in this view. Photo by Vera Ponomareva, 1975 (Institute of Volcanic Geology and Geochemistry, Petropavlovsk).