sandrock

It passes mainly through the purple — color soft sandrock and mudstone in Triassic or Dyas Systems.

隧道主要通过三迭系、二迭系紫红色软质砂岩、泥岩岩层。

The regional geologic structure is complex. The rock mass is mainly composed of Jurassic sandrock and conglomerate.

其坝址区区域地质构造复杂，分布侏罗系中统河湖相沉积的厚层砂岩。

The utility model discloses a mobile boom, which comprises a base, wherein a case adopting a sandrock as a counterweight is arranged on the base;

本实用新型公开了一种移动式扒杆，包括底座，在底座上设有采用砂石作 为配重的箱体。

In the process of Shanxi formation seam mining in Shaqu Colliery, the seam roof and floor sandrock aquifers constitute the direct discharge aquifers.

沙曲煤矿山西组煤层开采过程中，煤层顶底板砂岩含水层构成煤层开采时的直接充水含水层。