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As molten basalt cools, one of the minerals that forms is ______________, a black magnetic mineral.

User Srijan
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2 Answers

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As molten basalt cools, one of the minerals that forms biotite, a black magnetic mineral.
User Staszek
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The answer is: "biotite" .
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"As molten basalt cools, one of the minerals that forms is biotite , a black magnetic mineral.
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User Joshua Colvin
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