| Answer | Crossword Clue |
|---|---|
| phenocryst | a larger crystal in a porphyritic rock |
| phenocrysts | PHENOCRYST, a larger crystal in a porphyritic rock |
| phenocryst | A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass |
| phenocrysts | A large or conspicuous crystal in a porphyritic rock, distinct from the groundmass |
| rhyolites | A pale fine-grained volcanic rock of granitic composition, typically porphyritic in texture |
| groundmass | The compact, finer-grained material in which the crystals are embedded in a porphyritic rock |
