chapter 9

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Author:
cmglipin
ID:
267366
Filename:
chapter 9
Updated:
2014-03-21 15:03:35
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chapter 9
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chapter 9
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  1. Geologic column
    an ordered arrangement of rock layers that is based on the relative ages of the rocks and which the oldest rocks are at the bottom.
  2. era
    a unit of geologic time that includes two or more periods.
  3. period
    a unit of geologic time that is longer than an epoch but shorter than an era.
  4. epoch
    a subdivision of geologic time that is longer an age but shorter than a period.
  5. evolution

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