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Continental rifts typically contain large amounts of basalt and rhyolite. Your answer to Question 1.b., in Exercise 5.10 explained the origin of the basalt, but fractional crystallization of mafic magma can produce only a very small amount of felsic magma. Explain the origin of the large volumes of felsic magma in continental rifts.
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Continental rifts typically contain large amounts of basalt and rhyolite. Your answer to Question 1....
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