Submarine Canyon (English spelling)

Japanese: submarine canyon（英語表記）submarinecanyon

…Shelf channels, which cut shallowly into the continental shelf, are drowned valleys formed by the erosion of rivers and glaciers. There are two types of valleys on the continental slope: submarine canyons, which have steep walls and are narrow V-shaped, and submarine valleys, which are wide U-shaped. The former meander somewhat and gather branching valleys to reach the deep sea plain or ocean floor. …

From [Submarine Topography]

… escarpment—scarpA long, narrow, relatively steep-sloping area that separates flat or gently sloping areas. canyon— submarine canyon —a relatively narrow, deep depression with steep sides and a continuous slope at the bottom. fan cone — deep sea fan — deep sea cone — submarine fan — submarine cone —a relatively smooth landform that slopes regularly outward from the end of the seafloor or a collection of submarine canyons. …

*Some of the terminology that mentions "Submarine Canyon" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…大陸棚を浅く刻む陸棚谷shelf channelは河川や氷河の浸食した谷が沈水した溺れ谷である。大陸斜面上の谷には，谷壁が急で幅の狭いV字谷submarine canyon(狭義の海底谷)と幅の広いU字谷submarine valley(海谷)とがある。前者は多少蛇行しつつ樹枝状の支谷を集め深海平たん面や大洋底に達する。…

【海底地形】より

…　海底崖escarpment―scarp細長くかつ比較的急峻な斜面で，平たんなあるいは緩く傾斜する地域を分けているもの。　海底谷canyonsubmarine canyon―比較的狭く深い凹みで，両側は急峻で，底は連続的な傾斜を有する。　海底扇状地fancone―deep sea fan―deep sea cone―submarine fan―submarine cone―海底または海底谷の集りの末端から外側へ規則的に傾斜していく，比較的滑らかな地形。…