化石

• Human fossils unearthed there are helping to reconstruct the earliest stages of human existence .
  出土的人类化石有助于复原人类生活的最早期阶段。
• Different fossils have been preserved in different wayssome as moulds or casts .
  不同类别的化石是以不同的方式保存下来的有的如同模型或模压品。
• Potential fossils are relatively rare in the final deposits of normal quartz-sand beaches .
  在正常的石英质海滩的最终沉积物中隐匿的化石还是比较少的。
• The markings and fossils in the rocks, and the rocks themselves, are the first historical documents .
  岩石中的痕迹和化石以及岩石本身是最早的历史证件。
• Glauconite, detrital carbonate skeletal debris, marine fossils, and collophane are commonly present .
  海绿石、碳酸盐骨骸碎屑、海相化石和胶磷矿普遍出现。
• 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。
• Fossils embedded in or between the volcanic layers can thus be dated by this method with great accuracy .
  火山岩层间夹合的化石层可使这种测定年龄的方法极为精确。
• A relict fauna and anomalously coarse grains are common in the upper few feet of some shelf sands .
  残余化石和异常粗的颗粒，通常出现于某些陆棚砂上部的几英尺内。
• Fossils include the remains and traces of animals and plants which are found naturally embedded in rocks .
  化石包括人们发现的天然埋藏在岩石中的动植物遗骸和遗迹。
• Most fossil specimens are little more than carbon impressions although distinctive shapes are known .
  尽管清晰的形状已为人所知，但大多数化石标本只不过是炭质印痕。