| Answer | Crossword Clue |
|---|---|
| SILTSTONE | Type of sedimentary rock |
| STRATA | Geological beds of sedimentary rock. |
| ORE | Sedimentary rock |
| SHALE | Sedimentary rock |
| LIMESTONE | Sedimentary rock |
| SANDSTONE | Sedimentary rock |
| LIMESTONE | Sedimentary rock. |
| IRONSTONE | Hard sedimentary rock |
| LAYER | Sedimentary-rock feature |
| STRATA | Sedimentary rock beds |
| STRATA | Sedimentary rock layers |
| SANDSTONE | Common sedimentary rock |
| SANDSTONE | Certain sedimentary rock |
| SHALE | Thin-layered sedimentary rock |
| SHALE | Most common sedimentary rock |
| SHALE | Fine-grained sedimentary rock |
