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    Understanding Earth
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    Exam 8: Clocks in Rocks: Timing the Geologic Period
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    What Is Considered the Starting of the Clock for Isotopic
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What Is Considered the Starting of the Clock for Isotopic

Question 62

Question 62

Multiple Choice

What is considered the starting of the clock for isotopic dating of igneous rocks?


A) when the isotope starts to decay
B) when the isotope is trapped in the magma
C) when the rock solidifies
D) when the first daughter forms

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