Basalt is a __________ rock:
Correct answer: C. both A & B
- A. fine-grained
- B. Dark coloured
- C. both A & B
- D. None of the above
Explanation
Basalt cools rapidly at or near the surface, giving it a fine-grained texture, and its iron- and magnesium-rich minerals make it dark coloured. Thus both descriptions apply.
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