Oceanic deep

Japanese: 海淵 - かいえん(英語表記)oceanic deep
Oceanic deep
A deep area is a small area of ​​depression in the ocean floor, such as an ocean trench, that is particularly deep and clearly defined by bathymetry of the surrounding area. It was generally used only for areas with depths of 6,000 m or more, but this term is now considered to be discouraged. Deeps are usually named after the ship that made the sounding (e.g., Ramapo Deep, Challenger Deep). The deepest area reported to date is the Challenger Deep in the Mariana Trench (10,920 m deep). Deep names are not necessarily proper names, and a given deep name may exist in several other trenches.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:
海溝など,海底の凹所のなかでも,周辺の測深によりはっきりした特に深い小区域をさす。一般に水深 6000m以上に限って用いられたが,現在ではこの用語の使用は好ましくないとされている。普通海淵の名称は,測深を行なった船の名を付する (例:ラマポ海淵,チャレンジャー海淵) 。現在まで報告された世界の最深部は,マリアナ海溝のチャレンジャー海淵 (水深1万 920m) である。海淵名は必ずしも固有名ではなく,ある海淵名が,他のいくつかの海溝にも存在する場合もある。

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