A student notes that a rock contains mica and plagioclase feldspar and concludes that the rock is an intermediate rock. What piece of further information could best determine if the student's conclusion was the correct one?
A) the grain size of the crystals
B) the color of the rock
C) the amphibole content of the rock
D) the silicate content of the rock

Question

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The Answer of A student notes that a rock contains mica and plagioclase feldspar and concludes that the rock is an intermediate rock. What piece of further information could best determine if the student's conclusion was the correct one?
A) the grain size of the crystals
B) the color of the rock
C) the amphibole content of the rock
D) the silicate content of the rock

A Student Notes That a Rock Contains Mica and Plagioclase