![](https://www.oki-geopark.jp/wp/wp-content/uploads/2023/03/sekiheki-pyroclastic-cone-from-lookout-900-1.jpg)
Geohistory - Rocks from Volcanic Islands Period
Geosites / Chibu Village
Sekiheki (Red Cliff) is the cross-section of a small volcano that was once located here. The cliff's red rocks got their color when lava spray from the volcano came into contact with the air at a very high temperature, causing the iron content inside it to oxidize.