ECK Floor - ECK

…Of these, the Asahi Mountains, with their high-level low-relief surfaces at an altitude of 1,200 to 1,600 meters, are relics of the peneplain mentioned above, and Mt. Asahi, which protrudes a level higher than that, is thought to be a remnant hill. In addition, at an altitude of about 600 meters, there is an Eck bed (a ridge between two confluent rivers, a type of river terrace) with fresh riverbed gravel, which indicates that the uplift of the mountains continued until very recently.

*Some of the terminology that refers to the "ECK bed" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…そのうち，標高1200～1600mの高位小起伏面群をもつ朝日山地主部は，前記の準平原の遺物を残し，それより一段と高く突出する朝日岳は残丘と考えられる。また，標高600mほどのところに新鮮な河床礫（かしようれき）をのせるエック床(合流河間山稜面。河岸段丘の一種)があり，山地の隆起運動がごく最近まで続いていることを示す。…

※「エック床」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