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Related Clues:
- Pool table slab
- Rock fracked for gas
- Political list
- Group of candidates running together
- Stone used for roofing
- Web news mag
- Fracking material
- Rock that's "fracked"
- Something to write on with chalk
- Mud, after compaction
- Something fracked in fracking
- *Sedimentary rock
- Original school board?
- Patio flooring surface, sometimes
- Source of gas market includes hydrogen