Global Volcanism Program | Image GVP-02209
Hiyoriyama lava dome (left) was extruded during late stages of the eruption that produced the Oyunuma crater in the foreground. The dome is mantled by a thin layer of older sediments and breccias that were baked during uplift of the dome. The crater is 300-400 m wide and filled with hot water.
Photo by Tom Simkin, 1981 (Smithsonian Institution).