
also known as Mount Iwo, is an active
rhyolitic
Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture, but may be porphyritic, containing larger mineral crystals ( phenocrysts) in an otherwise fine-grained groundmass. The miner ...
lava dome
In volcanology, a lava dome is a circular, mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano. Dome-building eruptions are common, particularly in convergent plate boundary settings. Around 6% of eruptions ...
on
Iōjima in
Kagoshima Prefecture
is a Prefectures of Japan, prefecture of Japan located on the island of Kyushu and the Ryukyu Islands. Kagoshima Prefecture has a population of 1,527,019 (1 February 2025) and has a geographic area of 9,187 Square kilometre, km2 (3,547 Square m ...
, Japan. It sits within the borders of the town of
Mishima Mishima may refer to:
Places
* Mishima, Fukushima, a town in Fukushima Prefecture
* Mishima, Kagoshima, a village in Kagoshima Prefecture
* Mishima, Niigata, a town in Niigata Prefecture
* Mishima, Shizuoka, a city in Shizuoka Prefecture, Japa ...
.
The mountain is made up of non-alkali
felsic
In geology, felsic is a grammatical modifier, modifier describing igneous rocks that are relatively rich in elements that form feldspar and quartz.Marshak, Stephen, 2009, ''Essentials of Geology,'' W. W. Norton & Company, 3rd ed. It is contrasted ...
rock and pyroclasitic flows.
References
VolcanoWorld - Kikai, Kyūshū, Japan* S. Hamasaki
Volcanic-related alteration and geochemistry of Iwodake volcano, Satsuma-Iwojima, Kyushu, SW Japan ''Earth Planets Space'', pp 217–229, 2002, Tsukuba, Research Center for Deep Geological Environments, Geological Survey of Japan, AIST,
External links
- Japan Meteorological Agency
* - Japan Meteorological Agency
- Geological Survey of Japan
- Geological Survey of Japan
*
Io
Active volcanoes
Io
Io
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