Rock fan - rock fan
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A fan-shaped bedrock landform that develops on the edge of a mountain in its late or advanced stage. It is formed by lateral river erosion in the intermediate area between the area of intense mountain incision and the depositional area of the basin. A thin layer of gravel often remains on the bedrock. It is similar to a rock bed and tends to develop in arid areas. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
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壮晩年期または老年期の山地周縁に発達する，岩盤から成る扇状地状の地形。山地の下刻作用の激しい地域と盆地の堆積地域との中間地帯に河川の側方浸食によって生じる。岩盤上に薄く砂礫層が残ることが多い。岩石床に類似し，乾燥地域に発達しやすい。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
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