Thursday
April 24, 2014

Homework Help: science

Posted by tanya on Sunday, March 10, 2013 at 2:04pm.

In the laboratory small zircon crystals were separated from granite (K).
Isotopic analysis of these zircon crystals gives a 207Pb/235U ratio of 0.45. the half-life of 235U (7.04 108
years), estimate the age of the granite in Ma to two significant figures

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