Tarumai volcano was constructed on the SE rim of the 13 x 15 km Shikotsu caldera. The summit has a small 1.5-km-wide caldera that formed during eruptions in 1667 and 1739 CE. It contains a flat-topped summit lava dome that was extruded in 1909. Two other Holocene post-caldera volcanoes occur at Shikotsu, Fuppushi (adjacent to Tarumai) and Eniwa, on the opposite side of the caldera.

Photo by Ichio Moriya (Kanazawa University).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Galleries: Lava Domes | Calderas

Keywords: lava dome | caldera

Shikotsu