What Phenocryst Minerals Would You Expect to Find in an Aphanitic

question 66

Multiple Choice

What phenocryst minerals would you expect to find in an aphanitic rhyolite flow?

• A) quartz and K- feldspar
• B) apatite and muscovite
• C) intermediate (Ca- Na) plagioclase and amphibole or pyroxene
• D) Ca- rich plagioclase and olivine

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