砾

The top of the flow were armoured with boulders.

泥石流的顶部布满了漂砾。

The boulders are quite widely separated and much interstitial mud is visible.

这些漂砾彼此相隔较远并有许多填隙泥。

A layer of coarse gravel is often placed around the drain tile.

常常在排水瓦管周围铺一层粗石砾。

Some investigators maintain that large boulders must be supported by turbulence within a viscous debris flow.

有些调查者认为大漂砾是通过粘性泥石流中的涡流搬运的。

The components to be considered in this book include boulders, gravel, sand, silt and clay.

本书所考虑的组成部分包括漂砾， 砾石， 砂， 粉土和粘土。