Gamchen

Gamchen is a complex volcano composed of four stratovolcanoes, one of which is of Holocene age. Yuzhny Gamchen and Severny Gamchen are steep-sided eroded stratovolcanoes of Pleistocene age. Edifice-collapse events during the early Holocene produced several large debris-avalanche deposits below the eastern flanks.

Molodoi, a small stratovolcano with a shallow crater, is located on the E flank of Severvy Gamchen. Barany, a young stratovolcano with a crater 500 m wide and 200 m deep, is located on the SE flank of Yuzhny Gamchen. Barany is the source of a lava field extending to the E and NE that was active between about 3,600 and 3,000 years ago.

Lava domes are found on the flanks of the volcanoes; the youngest of these is Lukovitsa dome, which formed during the final stages of activity at Barany. No reported eruptions are known.