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1 July, 07:42

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

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  1. 1 July, 07:48
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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.
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