submarine delta

• 扇形地,海底扇,海底沙洲

submarine delta的用法和样例：

例句

1. Due to the regression, the submarine fans evolved into waning stage in the Late Cretaceous and the sedimentary rocks changed from shales to coarse sandstones even conglomerates.
   晚白垩世总体上属于海退过程，海底扇处于消亡阶段，其岩石由泥岩类向砂岩类直至砾岩类演化。
2. There are fertile fields in the Nile Delta.
   尼罗河三角洲土地肥沃。
3. They were the terror of the Ganges delta.
   他们已成为恒河三角洲的令人胆寒的力量。