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An igneous rock contains a pb-206/u-238 mass ratio of 0.372. how old is the rock?

An igneous rock contains a pb-206/u-238 mass ratio of 0.372. how old is the rock?
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An igneous rock contains a pb-206/u-238 mass ratio of 0.372. how old is the rock?

User HamsterWithPitchfork
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it determines where the rock was i can be liquid or solid...solid come from the ground and if rock melt then it in a volcano and can turn into liquid. but if its sits and cools off then....it turns right back into solid.
User TERMINATOR
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