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Udonejima volcano

Stratovolcano 209 m / 686 ft
Izu Islands, Japan, 34.47°N / 139.3°E
Current status: (probably) extinct (0 out of 5) | Reports
Udonejima volcano books
Typical eruption style: unspecified
Udonejima volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

Udonejima, though techincally part of the Izu Volcanic Arc, is actually considered to be situated just behind the true volcanic front, along a line of volcanoes that is oblique to the Izu Trench. The volcanic rocks of this lineament are characterized by high-alumina basalts, calc-alkaline basalts, andesites, and rhyolites (Onuma et al., 1983). The andesites are rich in pyroxene, and the rhyolites often contain hypersthene, hornblende, and biotite (Onuma et al., 1983).
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Source: Smithsonian / GVP volcano information


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