When Clay Minerals in a Shale Are Subjected to Elevated

question 34

Multiple Choice

When clay minerals in a shale are subjected to elevated temperature and pressure, they may change in the solid state (that is, without melting) to form platy minerals like ___ that are at equilibrium with the new temperature/pressure conditions.

• A) feldspar
• B) amphibole
• C) mica
• D) carbonate
• E) pyroxene

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