Obsidian and Volcanic Vent, Kishihama-tōge Pass

Geohistory - Rocks from Volcanic Islands Period

Geosites / Okinoshima Town

At Kishihama-tōge Pass, the path through which magma traveled was buried by pyroclastic rock, and inside it are volcanic glasses formed by the rapid cooling of magma: obsidian, perlite, and pitchstone.

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Obsidian and Volcanic Vent, Kishihama-tōge Pass

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