| Answer | Crossword Clue |
|---|---|
| basaltic | the dark, hard rock from a volcano |
| basalts | the dark, hard rock from a volcano |
| basalt | the dark, hard rock from a volcano |
| mudstones | A dark sedimentary rock formed from consolidated mud and lacking the laminations of shale |
| lavas | molten rock from a volcano |
| lava | molten rock from a volcano |
| lava | molten rock that issues from a volcano |
| lavas | LAVA, molten rock that issues from a volcano |
