What Small, Intrusive Igneous Rock Bodies Often Contain Gem- Quality

question 48

Multiple Choice

What small, intrusive igneous rock bodies often contain gem- quality crystals of minerals such as beryl and tourmaline and high concentrations of relatively rare elements such as lithium, cesium, and uranium?

• A) welded tuff sheets
• B) granitic pegmatites
• C) diorite plutons
• D) basaltic lavas

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