Geosite introduction of Aso

26.Nangodani Valley Geosite

Nangodani Valley Geosite

Characteristic topography related to the formation of Nango Valley

Along the banks of the Shirakawa River in the western section of Nangodani Valley, the land steps away from the river in terraces that experts believe were formed by repeated lava flows to Tateno Gorge further downriver. The lava was deposited in the Shirakawa River Valley and dammed the flow of water.

Terraced topography in Nangodani Valley

The natural terraces visible in Nangodani Valley, in the southern section of the caldera, provide important insight into the flow of rivers and lakes after the caldera was formed.