Moderate
Structure and size of aphantic rock is________________?
Correct answer: B. Fine grained
- A. Course-grained like
- B. Fine grained
- C. Large-Glassy
- D. Phenocryst
Explanation
Aphanitic rocks cool rapidly at or near the surface, leaving too little time for large crystals to form, so their texture is fine-grained. Phenocrysts are the larger crystals found in a porphyritic texture.
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