accretionary wedge

例句：

1. 1. The rocky terrain is shaped bythe accumulation of sediment over millions of years.
   数百万年的时间里，岩石地形是由沉积物积累形成的。
2. 2. The accretionary wedge is a geological feature that formswhen tectonic plates collide.
   构造板块碰撞时形成的地质特征是堆积楔。
3. 3. The accretionary wedgeis often used to explain how landforms are formed in mountainous regions.
   堆积楔常用于解释山地地貌是如何形成的。