Chichibu Geopark

Basic points

This is a mountain pass from Ogano Town in Chichibu District to Kanna Town in Tano District, Gunma Prefecture. This was a roadway from long ago that connected Saitama to Gunma and Nagano.

Visitors can observe the ou-chitai (concave area) with a stretch of stratum from approximately 130 million to 100 million years ago (Cretaceous Period of the Mesozoic Era) in the age of the dinosaurs.