The Mukaiyama lava dome lies at the southern end of the island of Niijima. It formed during a single eruption in July 886 CE beginning in shallow water with the formation of a tuff ring from repeated base surges, followed by a pyroclastic cone and lava domes.

Photo by Ichio Moriya (Kanazawa University).

Keywords: stratigraphy | outcrop | exposure | tephra | geology | deposit | lava dome

Niijima