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Q: Which characteristics provides the best evidence that this pegmatite solidified deep underground?
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Which characteristic provides the best evidence that his pegmatite solidified deep underground?

very coarse texture


Which characteristic provides the best evidence that pegmatite is solidified deep underground?

Very coarse texture.


What are some characteristics of empirical evidence?

jews


What is the natural vegetation region of Philadelphia PA what are the characteristics and evidence of the vegetation?

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How do geologist know that earth and the solar system are approximately 4.6 years old?

The details are quite complicated, but as I understand it, the main evidence is radioactive decay. The exact mix of isotopes of different elements in a compound can provide evidence of how old it is (sometimes this might mean, when a substance solidified), since the mix of isotopes will change over time, in case some of the isotopes are radioactive.