...Mount Fuji has already entered the dissection stage, and many nearly linear radial valleys, such as Osawa and Yoshida Osawa, have begun to carve the mountainside. In particular, Osawa (Osawa Kuzure) on the western slope is a long valley measuring approximately 10 km in length and 300 to 500 m in width. The collapse of rocks is said to have begun approximately 1,000 years ago, and it is still widening. In the alluvial fan at the foot of the mountain, erosion control works to mitigate damage from falling rocks have been carried out since 1969. *Some of the terminology that refers to the "Osawa Collapse" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…なお富士山はすでに開析期に入り,大沢や吉田大沢など多くのほぼ直線状の放射谷が山腹を刻み始めている。とくに西斜面の大沢(大沢崩れ)は長さ約10km,幅300~500mにわたる長大な谷で,岩石の崩壊は約1000年前から始まったとされており,現在も幅が広がりつつある。裾野の扇状地部では,落石被害緩和のための砂防工事が1969年以降行われている。… ※「大沢崩れ」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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