It cuts a clean cylinder of rock , from which can be seen the strata the drill has been cutting through . 它切割出一块表面光滑的圆柱体石头，从这石块上可以看出钻头在切割的岩层。
The following example concerns the blasting of the last five metres towards a house with its foundations in bedrock . 下面的例子是关于向着一座地基在岩层上的房屋爆破的最后5米的情况。
The widespread progradationally deposited cycles are often capped by oolitic shoals, tidal flat or sabkha evaporite strata . 广布的加积沉积旋回、经常被鲕滩，潮坪或萨勃哈蒸发岩层所覆盖。
the high content and the high water temperature favour the solution of salt and metals from the underground formations. 高含量和高水温促进了地下岩层里盐类和金属的溶解。
The relation between outcrop width and thickness depends on the dip of the bed, the slope of the ground, and the direction of traverse . 露头宽度与厚度的关系取决于岩层的产状、地面坡度和路线方向。
Variations in the reflection times from place to place on the surface usually indicate structural features in the strata below . 反射波在地面从一处到另一处的时间变化，通常是地下岩层构造特征的标志。
Under the circumstances, gypsum or anhydrite could accumulate to form beds many meters thick, without any co-precipitation of halite . 在这种环境下，石膏或硬石膏可以堆积成许多米厚的岩层，而没有任何石盐伴生沉淀。
The outcrop pattern that the bed should make on the map may be determined by using the structure contour method, in reverse as shown in figure 14 . 该岩层在图上应有的露头形态可与图14相反，用构造等高线法予以确定。
The outcrop of the bed is then drawn through the intersecting contour points bearing in mind the closure directions anticipated from the rule of vs . 考虑到V字形法则预计的圈闭方向，通过等高线交点勾出岩层的露头线。
Electrical resistance in a rock sample may also vary 岩层样本的电阻也会改变。
