岩

• The volcanics are most commonly andesitic in composition .
  火山岩的组成最通常是安山岩。
• Detritus usually consists of gravel, sand and clay .
  岩屑通常是由砂砾，沙和粘土组成的。
• The mud is interrupted by numerous thin beds of limestone .
  泥质物被许多薄层灰岩所隔开。
• The magnesite originated from the peridotite by weathering .
  菱镁矿是由橄榄岩风化形成的。
• There are infiltration center on lava and agglomerates .
  在熔岩或集块岩上有渗漏中心存在。
• Alternating sandstones and shales are regarded as important .
  蚀变的砂岩和页岩是很重要的。
• It includes epigenetic uranium impregnations in sandstone .
  它意味着外生的铀进入到沙岩中。
• A low-sensitivity probe was purchased to cope with the ore .
  低灵敏度的探测器用于测量岩心。
• Reflectivity depends on the velocity and density of rocks .
  反射能力取决于岩面的速度和密度。
• The gabbro dikes are short .
  辉长岩岩脉短。