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Author Question: The Phanerozoic eon and the Paleozoic era began about ______________ million years ago. Fill in the ... (Read 90 times)

sarasara

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The Phanerozoic eon and the Paleozoic era began about ______________ million years ago.
 Fill in the blank(s) with correct word

Question 2

Reasonable values for the absolute ages of sedimentary rocks are frequently determined by relating them to ______________ rocks whose absolute ages have been determined.
 Fill in the blank(s) with correct word



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chereeb

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Answer to Question 1

545

Answer to Question 2

igneous





 

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