Moderate
The relative abundance of three types of rocks ( igneous-metamorphic- sedimentary) in the earth's crust is_________?
Correct answer: B. 64.7 % - 27.4 % - 7.9 %
- A. 12.5 % -12.5 % - 75%
- B. 64.7 % - 27.4 % - 7.9 %
- C. none of A & B
- D. 7.9% - 27.7 % - 64.4
Explanation
The commonly cited crustal proportions are approximately 64.7% igneous, 27.4% metamorphic, and 7.9% sedimentary rocks. Thus option B gives the matching sequence.
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