砂岩

• Information about this type of sandstone body has not been available until recently .
  直到目前为止，还没有关于这类砂岩体的资料可资借鉴。
• The age equivalence of fossils found in the sandstone and the shale is thus demonstrated .
  发现于砂岩和页岩中化石的等时性就这样得到证明了。
• The cower unit of the eagle is a wellsorted lithic and glauconitic marine sandstone .
  伊格尔砂岩的下部单元是分选良好的岩屑质和海相海绿石质。
• It can never be used as the sole criterion for identifying a channel sandstone in the subsurface .
  它完全不能作为鉴定地下水道砂岩的唯一准绳。
• There is a direct relation of this surface to the distribution of a lenticular sandstone which overlies it .
  这个面直接控制着它上面的透镜状砂岩的分布。
• Within such deposits there may be numerous potential traps for oil and gas in separate sandstone bodies .
  在这种沉积中的散砂岩体内，可能有许多潜在的油气圈闭。
• A sharp crack might remain fairly sharp in granite, but degenerate into a dull thud in sand .
  在花岗岩中尖锐的破裂声可以保留相当的强度，而在砂岩中则易变成低沉的轰响。