This photo shows the saddle between Nipesotsudake and Maruyama lava dome. The Nipesotsu-Maruyama volcano group, located E of Tokachidake, is composed of a number of overlapping lava domes constructed along a NW-SE trend. A minor phreatic eruption took place at Maruyama lava dome in 1898, and fumaroles are present on one of its summit craters.

Copyrighted photo by Yoshihiro Ishizuka, 1998 (Japanese Quaternary Volcanoes database, RIODB, http://riodb02.ibase.aist.go.jp/strata/VOL_JP/EN/index.htm and Geol Surv Japan, AIST, http://www.gsj.jp/).

Keywords: lava dome

Maruyama