Global Volcanism Program | Image GVP-10555
Numazawa caldera lake is viewed from its NE shore with a 40,000-year-old lava dome forming the right horizon. The 1.5 x 2 km caldera was formed about 5,000 years ago during the eruption of the Numazawako Pumice Flow and Plinian fall deposit. The small Numazawa caldera was constructed within an older Pliocene caldera.
Copyrighted photo by Tadahide Ui (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/).