OKI ISLANDS UNESCO
GLOBAL GEOPARK
Geohistory - Rocks from Volcanic Islands Period
Geosites / Okinoshima Town
This rhyolite was formed by lava around 5.5 million years ago, and has a characteristic flow-like striped pattern.
Rhyolitic lava is highly viscous and does not flow well; this keeps the different components in the lava from mixing as it spreads, resulting in this striped pattern.
Mantle Xenoliths, Kuroshima Island
The small island you can see offsho…
Misaki Basalt Explosion Crater
This plateau in the Misaki area of …
Obsidian and Volcanic Vent, Kishihama-tōge Pass
At Kishihama-tōge Pass, the path th…
Tokage-iwa (Lizard Rock) Seen From the Lookout
From here, you can see a strangely-…
