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  • 03-10-2017
  • Biology
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Fossils in _______ layers of rock are generally estimated to be _______ than fossils found in the upper layers.

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XxQuikSkopeMastrXx
XxQuikSkopeMastrXx XxQuikSkopeMastrXx
  • 03-10-2017
compressed is the first blank and older is the second one
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