Moderate
Fine-graned rocks formed on earth crust are called____________________?
Correct answer: B. Extrusive rock
- A. Intensive igneous rock
- B. Extrusive rock
- C. Sedimentary rock
- D. Plutonic
Explanation
Extrusive igneous rocks cool rapidly at or near the Earth’s surface, producing small crystals and a fine-grained texture. Plutonic or intrusive rocks cool slowly underground and are usually coarse-grained.
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