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Which of the following provide chemical evidence of ice ages? A. variations in pH levels in fossils B. concentrations of compounds in rock C. variations in ratios of isotopes in fossils D. concentrations of compounds in old trees
Concentrations of compounds in rock provide chemical evidence of ice ages.
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Asked 7/6/2016 12:58:51 PM
Updated 7/6/2016 1:22:42 PM
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This answer has been confirmed as correct and helpful.
Edited by jeifunk [7/6/2016 1:22:41 PM], Confirmed by jeifunk [7/6/2016 1:22:42 PM]
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