| Answer | Crossword Clue |
|---|---|
| plutonic | pertaining to pluton (the formation of igneous rock) |
| plutons | PLUTON, the formation of igneous rock |
| magmatic | pertaining to magma (the molten matter from which igneous rock is formed) |
| trachytic | of, pertaining to, or resembling, trachyte, an igneous rock |
| spilitic | pertaining to spilite (igneous rock) |
| dunitic | pertaining to dunite (an igneous rock) |
| picritic | pertaining to picrite (an igneous rock) |
| ophitic | pertaining to ophite (an igneous rock) |
| diabasic | pertaining to diabase (an igneous rock) |
| dioritic | pertaining to diorite (an igneous rock) |
