Sanbagawa metamorphic belt

Japanese: 三波川変成帯 - さんばがわへんせいたい

A crystalline schist zone stretching for over 800 km, starting from the Kanto Mountains, passing through the Ina region of Nagano Prefecture, western Shizuoka Prefecture, the Kii Peninsula, and Shikoku, and ending in Yatsushiro, Kyushu. Some parts contain glaucophane schist and jadeite . The name comes from the fact that the crystalline schist distributed in the Sanbagawa River basin in Gunma Prefecture was called Sanbagawa crystalline schist. It is thought to have been formed by mountain building in the latest Cretaceous period of the Mesozoic era.

Source: The Selected Edition of the Japanese Language Dictionary About the Selected Edition of the Japanese Language Dictionary Information

Japanese:

関東山地にはじまり、長野県伊那地方、静岡県西部、紀伊半島、四国を経て九州八代(やつしろ)に至る延長八〇〇キロメートル以上に及ぶ結晶片岩地帯。一部に藍閃石片岩、翡翠(ひすい)輝石を産する。群馬県三波川流域に分布する結晶片岩を三波川結晶片岩と呼んだことに由来する。中生代白亜紀最後期の造山作用によって形成されたと考えられる。

出典　精選版日本国語大辞典精選版日本国語大辞典について　情報

<<: Pier - Sanbashi (English spelling)

>>: The Three Wise Men Visit - Sankase no Sanpai