海底峡谷是海底窄而深的长条形负地形,横剖面呈现出“V”字形和“U”字形两种形态(如下图所示:C剖面揭示的峡谷横截面“V”字形和“U”字形)。海底峡谷谷壁高而陡,谷轴弯曲,支谷汊道甚多,形似陆上的峡谷。发育于大陆边缘,主要在大陆坡上,头部多延伸至陆坡上部或陆架上,甚至接近海岸线,多数下部可延伸至大陆坡麓部,峡谷口常为缓斜的海底扇地形,是浅水沉 The submarine canyon is a narrow and deep long bar negative terrain at the bottom of the sea. The cross section shows the shapes of “V” and “U” (as shown in the following figure: C section reveals the valley cross section “V” “Glyphs and ” U "glyphs). Submarine canyon Valley wall high and steep, valley axis bent, many branches Valley Road, shaped like a land Canyon. Developed in the continental margin, mainly in the continental slope, the head extended to the upper part of the slope or on the shelf, and even close to the coastline, most of the lower reaches of the slope can be extended to the mainland, the gorge mouth is gentle inclined submarine fan terrain, shallow water sink