小さな火山地形がいっぱい！？ 萩の阿武火山群と 津和野の日本最古の石を バイクで見に行く

Hagi city in Yamaguchi prefecture may have a strong image of a castle, but in fact there are many hidden traces of small volcanoes. The Abu volcanic group, which began activity 2 million years ago, created a large amount of lava plateaus. And in Tsuwano town in Shimane prefecture, southeast of Hagi city, the oldest granite gneiss in Japan, dating back 2.5 billion years, was discovered. What exactly is gneiss? We'll explain the fascinating topography and geology of Hagi and Tsuwano as we tour them by motorbike. 🌟Membership registration    / @chiri_rider   ★Website "Listen to the voice of the contour lines!" http://chiririder.com/ ★Chiri Rider's Twitter (follow now)   / chiri_rider   ★Question box (for questions and requests not directly related to the video, please go here) https://peing.net/ja/chiri_rider Source of geological map: AIST Geological Survey of Japan "1:200,000 seamless geological map of Japan v2" https://gbank.gsj.jp/seamless/v2.html