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Earth and Space Sciences · 术语表

什么是 The parts of the ocean floor？

又称： continental shelf · continental slope · abyssal plain · ocean ridge · ocean trench

Definition 26.1 Primary & Middle School Earth and Space Sciences · 第 26 章 — The Oceans
  • The continental shelf is the shallow, gently sloping edge of a continent under the sea.
  • The continental slope is the steep slope that leads down from the shelf to the deep ocean floor.
  • An abyssal plain is a vast, very flat and deep part of the ocean floor.
  • An ocean ridge is a long chain of underwater mountains rising from the abyssal plains.
  • An ocean trench is a long, narrow and very deep trough in the ocean floor, often next to a chain of mountains or volcanic islands.
Two real profiles of the ocean floor, from the ETOPO1 relief read every degree of longitude. Top: across the South Atlantic, from South America to Africa. Bottom: across the Pacific edge of South America. The heights are stretched 260 and 148 times compared with the distances (vertical exaggeration), otherwise the ocean would look as thin as a sheet of paper; and with one point every degree, the narrow trench looks shallower than it is. Two real profiles of the ocean floor, from the ETOPO1 relief read every degree of longitude. Top: across the South Atlantic, from South America to Africa. Bottom: across the Pacific edge of South America. The heights are stretched 260 and 148 times compared with the distances (vertical exaggeration), otherwise the ocean would look as thin as a sheet of paper; and with one point every degree, the narrow trench looks shallower than it is.
Two real profiles of the ocean floor, from the ETOPO1 relief read every degree of longitude. Top: across the South Atlantic, from South America to Africa. Bottom: across the Pacific edge of South America. The heights are stretched 260 and 148 times compared with the distances (vertical exaggeration), otherwise the ocean would look as thin as a sheet of paper; and with one point every degree, the narrow trench looks shallower than it is.
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