Geohistory - Rocks from Volcanic Islands Period
Geosites / Okinoshima Town
On the Uzuki Coast you can find the most recent lava in the Oki Islands, from around 400 thousand years ago. Much of the coast is formed by lava that cooled and hardened as it flowed out of the volcano, creating round boulders that appear to be piled on top of each other. On a nearby hill with a small shrine built on it, you can also see columnar joints.
Here you can also see the oriental chive (Allium maximowiczii), a subalpine plant growing right near the coast.