Geology

The age of granite can be determined using radiometric dating. How would I explain the basis for the determination of a 238 U-Pb radiometric date of 1120 Ma for granite? Any help gratefully received.

Tough one. I wonder if the following search results might help?

http://www.google.com/search?hl=en&lr=&as_qdr=all&q=dating+granite+238+U-Pb+

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asked by Sam

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