…The Appalachian Mountains are a peneplain formed from Paleozoic folded mountains that were then uplifted again. Although the maximum elevation of the Appalachian Mountains is only about 2000m, they were a major obstacle to the colonization of the West during the American pioneering period. The Appalachian Mountains are divided into (1) the peneplain Piedmont (mountain foothills) plateau, (2) the Blue Ridge and Great Smoky Mountains, (3) the Ridge and Valley region, and (4) the Appalachian Plateau. Waterfalls and rapids have formed between the Piedmont Plateau and the Coastal Plain to the east due to differences in the resistance of rocks to erosion, and the boundary between the two is called the Fall Line. … *Some of the terminology that refers to the "Appalachian Plateau" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…アパラチア山脈は古生代の褶曲山地が準平原化し,それが再び隆起したもので,標高は最高約2000mを示すにすぎないが,アメリカの開拓時代に西部への植民にとって大きな障害となった。アパラチア山脈は,(1)準平原化したピードモント(山麓)台地,(2)ブルー・リッジ,グレート・スモーキー山脈,(3)リッジ・アンド・バレー(連嶺と縦谷)地区,(4)アパラチア高原に区分される。ピードモント台地と東のコースタル・プレーン(海岸平野)のあいだには岩石の浸食抵抗の違いにより,滝や早瀬が形成され,その境界線は滝線と呼ばれている。… ※「アパラチア高原」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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