| Answer | Crossword Clue |
|---|---|
| kreeps | KREEP, a basaltic lunar rock |
| kreep | a basaltic lunar rock |
| tholeiite | a basaltic rock rich in aluminum |
| tholeiites | THOLEIITE, a basaltic rock rich in aluminum |
| picrites | A dark basaltic rock rich in olivine |
| tholeiitic | of or like tholeiite, a basaltic rock rich in aluminum |
| nephelinite | A fine-grained basaltic rock containing nepheline in place of plagioclase feldspar |
