| Answer | Crossword Clue |
|---|---|
| IGNEOUS | Like basalt and obsidian |
| IGNEOUS | Like granite and basalt |
| nephelinite | a basalt-like rock compound of pyroxene and nepheline |
| nephelinites | NEPHELINITE, a basalt-like rock compound of pyroxene and nepheline |
| tachylitic | of or like tachylyte, a vitreous form of basalt also TACHYLYTIC |
| tachylytic | of or like tachylyte, a vitreous form of basalt also TACHYLITIC |
