A shale metamorphosed to high metamorphic grade would become a(n)

Name: A shale metamorphosed to high metamorphic grade would become a(n)
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Question

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A shale that undergoes high-grade metamorphism will transform into a gneiss. This is because the intense heat and pressure of high-grade metamorphism causes minerals to recrystallize and reorganize, resulting in the formation of bands of different minerals that give gneiss its characteristic banded appearance.

A Shale Metamorphosed to High Metamorphic Grade Would Become A(n)