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1.前言北海道,在地质构造上位于千岛弧和东北日本弧的交汇部位。可区分为,作为东北日本弧北方延长部分的西南北海道和作为千岛弧西南延长端部的东北北海道,以及位于两者中间的呈南北伸展的日高、神居古潭带的中央北海道。
1. Introduction Hokkaido is located at the intersection of the Kuril Arc and the northeastern Japan Arc in geological structure. It can be distinguished as the Hokkaido Hokkaido that is the northern arc extension of northeast Japan and the northeastern Hokkaido that is the extended southwest of the arc of the arc and the central Hokkaido that stretches north and south and is home to the Hokuto and Kami Tanbun belts.