… Terraces are classified into rock terraces (made of only bedrock or a very thin layer of terrace deposits on bedrock) and gravel terraces (made of thick terrace deposits on bedrock). Terraces are also classified into erosional terraces and accumulation terraces or fill terraces, depending on the erosion and deposition that formed the terrace surface. Therefore, depending on the combination of the two, terrace surfaces are divided into three: (1) gravel accumulation terraces (also called filltop terraces), (2) gravel erosion terraces (fillstrath terraces), and (3) rock erosion terraces (strath terraces). … *Some of the terminology that mentions "erosional terrace" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 段丘はその構成物質によって,岩石段丘(基盤岩石だけ,あるいはその上にのるごく薄い段丘堆積物からなる)と砂礫段丘(基盤岩石の上にのる厚い段丘堆積物からなる)に区分される。また段丘は,段丘面を形成した浸食・堆積作用により,浸食段丘erosional terraceと堆積段丘accumulation terrace,fill terraceに区分される。したがって,両者の組合せによって段丘面は,(1)砂礫堆積面段丘(フィルトップ段丘filltop terraceともいう),(2)砂礫浸食面段丘(フィルストラース段丘fillstrath terrace),(3)岩石浸食面段丘(ストラース段丘strath terrace)に三分される。… ※「erosional terrace」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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