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swaggerriffic swaggerriffic
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10 years ago
    A. Muscovite mica
    B. Sodium-rich plagioclase
    C. Quartz
    D. Pyroxene
    E. Potassium feldspar
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10 years ago
B. Sodium-rich plagioclase
Source  (Kresan, 2006, p. 265).
Kresan, P., & Mencke, R. (2006). Student study guide for Grotzinger, Jordan, Press, and Siever's Understanding earth. New York: W.H. Freeman.
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