Ekarma volcano is a slightly truncated cone up to 1170 m high. Numerous lava flows up to 3 km long descend from the top to all directions. The summit crater is sealed with an extrusion dome that completely covers the ridge and gives the apex a pointed shape. The coastline of the volcano has a multi-lobed shape in places: protruding “tongues” are composed of lava flows, and pyroclastic rocks are exposed in the bays between them. The lavas of Ekarma volcano are represented by two-pyroxene andesites and andesite basalts. The apical dome and the last viscous lava flows are composed of more acidic two-pyroxene andesites with a noticeable admixture of hornblende in phenocrysts.
References
Горшков Г.С. Вулканизм Курильской островной дуги / Отв. ред. Рудич К.Н. М.: Наука. 1967. 288 с.  Горшков Г.С. Каталог действующих вулканов Курильских островов // Бюллетень вулканологических станций. 1957. № 25. С. 96-178. Гущенко И.И. Извержения вулканов мира. Каталог / Отв. ред. Рудич К.Н. М.: Наука. 1979. 476 с. |
