| Answer | Crossword Clue |
|---|---|
| GEODE | Rock formation |
| TERRANE | Rock formation |
| PILLAR | Rock formation |
| CRAG | Rock formation. |
| SIAL | Rock formation |
| TERRANE | Rock formation. |
| LEDGE | Rock formation. |
| SIAL | Rock formation. |
| CRAG | Rock formation |
| KARST | Limestone rock formation |
| TILLITE | Geologic rock formation. |
| OOID | Round rock formation |
| MESA | Colorful rock formation. |
| CRAG | Rugged rock formation |
| TERRANE | Rock formation, to geologists |
| INLIER | Type of rock formation. |
| THETWELVEAPOSTLES | Rock formation of Australia |
| SLOTCANYON | Deep but narrow rock formation |
| SIMA | Sub-ocean floor rock formation |
