Ichishi Fault - Ichishi Fault

...It was formed by the Rokko Tectonics that occurred in the Kinki region in the late Cenozoic era, and is thought to have been formed when the previously widespread, low-relief surface of a peneplain was gradually raised in a wave-like manner along a north-south axis. As the mountain range was raised, the Omi-Iga Fault was formed on the west side of the range, and the Ichishi Fault was formed on the east side. The east side is a steep cliff formed by a reverse fault, and it is a tectonic mountain range that takes the form of a tilted land mass that slopes gently to the west. The summits still retain their past flat surface in places, and the highest peak, Oike-dake (1241m), as well as Mt. Gozaisho (1210m), Mt. Shakagatake (1092m), Mt. Ryugatake (1100m), and Mt. Ryozen (1084m), are lined up with a constant height. ...

*Some of the terminology that refers to the "Ishishi Fault" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…新生代後期に近畿地方でみられた六甲変動によって形成されたもので，それまで広範に広がっていた準平原状の小起伏面が，南北方向の軸をもって順次，波状に隆起してできたと考えられる。山脈が隆起していく過程で，山脈の西側に近江伊賀断層，東側に一志（いちし）断層を伴い，東側は逆断層によってできた急崖となっており，西に緩傾斜した傾動地塊の姿をとる地塁山地である。山頂部にはところどころに過去の平たん面を残しており，最高峰の御池岳（おいけがたけ）(1241m)をはじめ御在所（ございしよ）山(1210m)，釈迦ヶ岳(1092m)，竜ヶ岳(1100m)，霊仙（りようぜん）山(1084m)など定高性を保って並んでいる。…

※「一志断層」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