沉积

• Fluviatile sands deposited by delta distributaries are quartzose .
  三角洲分流中沉积的河流砂是石英质的。
• The u-shape of some glacial valleys may be due also to deposition .
  某些U型冰川谷也可能起因于沉积作用。
• Eventually they deposit most of their sediment in the oceans .
  最后把它们搬运的大部分沉积物沉积在海洋里。
• Deposition is usually episodic rather than smoothly continuous .
  沉积作用通常是周期性的而不是平稳连续的。
• Sedimentation and denudation play a role in exceptional cases .
  沉积和剥蚀作用的影响只在特殊情况下起作用。
• When deposited, 70-80% of the volume of muddy sediments may be water .
  泥质沉积物沉积后，体积的70-80是水。
• Recent history of sedimentation is seen to be a recapitulation of the past .
  近代沉积史看来就是过去沉积史的重演。
• These sandstones are interpreted as having originally been point bar deposits .
  这些砂岩在成因上被解释为点沙坝沉积。
• They can also be transmitted through thick deposits of unconsolidated sediments .
  它们也可能通过未固结沉积物的沉积层。
• If the deposit is on the inside of the c, the macrostress is tensile .
  如果沉积层是处于C形的内面，宏观应力是拉伸型的。