… The bottom of the continental shelf, shallower than 200 m, is made up of relatively coarse terrigenous sediments carried over from the land. On the continental slope, deeper than 200 m, there is little mud or sand carried over from the land, and there are pelagic sediments consisting mainly of plankton remains, and sub-oceanic sediments containing fine terrigenous mud. The deeper ocean floor is made up of a muddy soft mud made up of the remains of very fine organisms. … *Some of the terminology that refers to "Suboceanic deposits" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 200mより浅い陸棚の海底には,陸地から運びこまれた,わりに粒の粗い陸性堆積物がある。深さ200m以深の大陸斜面では陸から運ばれてきた泥や砂は少なくて,おもにプランクトンの遺骸からなる遠洋性の堆積物と,粒の細かい陸源の泥を含む亜洋性堆積物がある。もっと深い大洋底は非常に細かい生物の遺体からできたどろどろの軟泥からなる。… ※「亜洋性堆積物」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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