Global Volcanism Program | Image GVP-05636
Onuma lake in the foreground is surrounded by Iwaonupuri (the large peak in the background), Nitonupuri, and Waisuhorun volcanoes. The latter two are located on the NW slope of Iwaonupuri. The younger lava dome (to the left) of Iwaonupuri overlies the older dome to the right. The contact is at the white fumarolically altered area in the right-center. The eastern slope of Nitonupuri lava dome is seen at the right-foreground.
Photo by Yutaka Kodama, 1996 (Hokkaido University).