Related Clues:
- Oil-yielding rock
- River-delta material
- What hunters hunt
- Rock that splits easily
- Fossil-yielding rock
- Rock made from layered mud
- Hunted animal
- Slate, originally
- Fossil source
- A source of oil
- Oil-producing rock
- Clay product
- Most common sedimentary rock
- Fine-grained sedimentary rock
- Pit for extracting stone or slate