Geohistory - Terrain
The explosion crater in the Misaki area of Dōgo Island is about 250 m in diameter and 100 m high, and its appearance resembles a giant bowl cut in half. It is formed of basaltic lava and pyroclastic rock that erupted about 550 thousand years ago. Bands of reddish-brown color appear where the lava experienced high-temperature oxidation. The crater's cross section is visible because the eastern half of the crater is believed to have been blown away by a phreatic (steam) explosion.
From the explosion crater to the entrance of Saigō Bay, a series of gently sloping lava plateaus can be seen, as well as a clear view of the ferries as they come and go from Saigō Port.
