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OpenStudy (anonymous):
A geologist is studying two different rhyolite flows to determine if they were erupted at the same time. 9)Rhyolite #1 has 50% of the parent Isotope F remaining. How many half lives have occurred? 10)Rhyolite #2 has 75% Daughter G and 25% parent H. How many half lives has the rock gone through? 11)Parent Isotope F in the first question has a half life of 100 million years. Use your answer from question 9 to determine the age of rhyolite#1.
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