…As plates are produced and separated, the traces of transform faults extend onto the ocean floor and form fracture zones. Fracture zones are extremely long and narrow zones accompanied by seamounts, troughs, undersea cliffs, etc., and are past structural zones that indicate the direction of plate movement, but no seismic activity is observed. The older the ocean floor, which is the surface of the ocean plate, the deeper it is and the more it is flattened by sediments, but there are many seamounts within it. … *Some of the terminology that refers to "submarine cliff" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…プレートが生産され離れていくにしたがい,トランスフォーム断層の痕跡は大洋底に伸び出し断裂帯を形成する。断裂帯は海山,トラフ,海底崖などを伴うきわめて細長い地帯で,プレート運動の方向を示す過去の構造帯であり,地震活動はみられない。 海洋プレートの表面にあたる大洋底は,古いものほど水深が深くかつ堆積物におおわれ平たん化されているが,その中に多くの海山がある。… ※「海底崖」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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