長瀞の岩畳：Nagatoro rock pavement

ここは関東山地から九州まで、約840kmにわたって続く三波川帯の東の端にあたります。岩畳は、結晶片岩の板のように剥がれやすい特徴である「片理（へんり）」（水平方向）と、地下深くから隆起した際にできた割れ目「節理（せつり）」（垂直方向）、そして荒川の侵食がつくった地形です。 It is located at the eastern end of the Sambagawa Belt, which stretches approximately 840 km from the Kanto Mountains to Kyushu. The rock pavement is the result of the horizontal "Henri," a feature of crystalline schist that tends to peel off like a slab, the vertical "Setsuri," fractures created by uplift from deep underground, and the erosion of the Arakawa River. 📍 [秩父郡長瀞町, 埼玉県](https://scaniver.se/L36.09505,139.11574)