Oki-Dogo (Japan)

Status Normal Eruption Unknown 151m
Shield (Subduction zone / Continental crust (> 25 km))

The Oki-Dogo islands, north of the SW Honshu city of Matsue, are one of several locations of Holocene volcanism on islands of the Japan Sea off the west coast of Japan. The islands are largely Pleistocene in age, and dated rocks range from about 800,000 to 300,000 years old. Tomita (1969) described a shield volcano and cinder cone that have produced Holocene basalts. These alkaline basalts are related to the opening of the Japan Sea and contain abundant mantle-derived xenoliths. The Daimanji-san lava flow overlies alluvial gravel containing an ancient water-jar. The name Takuhi-yama ("Burning Mountain") may record a tradition of an eruption.

Maru-yama cone is the low-angle peak at the left and Odoko-yama on the right in this offshore view of Oki-Dogo Island. The Oki-Dogo Islands, north of the SW Honshu city of Matsue, are largely Pleistocene in age. The Daimanji-san lava flow on Oki-Dogo overlies alluvial gravel containing an ancient water-jar, and the name Takuhi-yama ("Burning Mountain") may record a tradition of an eruption.

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/).

Last updated 2019-08-04 00:28:02