Snow mantles the western flanks of Omurayama scoria cone in the Izu-Tobu volcano group. Omuroyama formed about 5,000 years ago. The volcanic field is located across a broad, plateau-like area of more than 400 km² on the E side of the Izu Peninsula. About 70 monogenetic cones erupted during the last 140,000 years, and chemically similar submarine cones are located offshore.

Copyrighted photo by Akira Takada (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/).

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Keywords: scoria cone | volcanic field

Izu-Tobu