Related Clues:
- Stone that splits easily into fine pieces
- Layered sedimentary rock
- Where you have to dig for your prey
- What you're after is a dugout, perhaps
- Prey - mine
- Mine - prey
- Hunted animal - excavation
- Hunted animal - mine
- Sedimentary clay rock, which may contain oil
- Rock often containing quartz
- Oil-rich mineral
- Fossil holder
- Kerosene source
- Fissile rock
- Fracking rock