Solutions A dark glasslike volcanic rock formed by rapid solidification of lava has 4 entries with similar clues
- 4-letter words
- tuffRock formed from volcanic ash
- 6-letter words
- basaltDark rock of volcanic origin
- 7-letter words
- calderaA large volcanic crater formed by the collapse of the volcano's mouth
- 8-letter words
- crystalsRocks formed by the solidification of a substance