岩层

• The deposit is contained in the predominantly calc-silicate upper part of the corella formation .
  矿床位于科雷拉岩系上部主要为钙质-硅酸盐类的岩层中。
• Fossils "label" the rocks in which they occur and yield much information about the past .
  化石给他们所在的岩层"贴上了标签"，并提供了许多关于过去的信息。
• Two features of folds in stratified rocks that contain strut members invite special attention .
  包含在承压岩层内的成层岩石中的褶皱，有两个特点引人特别注意。
• Spacings between anticlinal crests and synclinal troughs in the member tend to be equal in some series of folds .
  岩层中的背斜峰和向斜谷之间的距离趋于相等。
• Mechanical changes and sometimes lithological changes, take place in the rocks on either side of the fault .
  断层两边岩层发生机械力学变化，有时也有岩性变化。
• When a rock is heated by the sun, its surface expands more than its interior, and a layer may break off .
  岩石受到日晒时，其表面比内部更为膨胀，就可能引起岩层破裂。
• For the determination of the thickness of basaltic layers the survey area has to be extended into sedimentary area .
  为了测定玄武岩岩层的厚度，测区必须扩大到沉积岩区。
• It may be gouge of finely comminuted rock material with perhaps large blocks of the harder rocks embedded in it .
  可能是磨碎的岩层物质组成的断层流，并夹杂一些大块坚硬岩石。
• The absorption of elastic waves in rocks has been the subject of extensive theoretical and experimental study .
  弹性波在岩层内的吸收问题曾经是理论上与实验上广泛研究的课题。
• Oil is usually found in porous rock under a layer of impermeable rock which prevents it from escaping .
  石油通常存在于多孔性的岩石中，上面覆盖着不可渗透的岩层，使石油不致散失。