Crossword puzzle clue "mineral layer involved in fracking"

Here are the possible solutions for mineral layer involved in fracking clue

Answer
Clue
Relevancy
shale
Clue
Mineral layer involved in fracking
asbestos
Clue
Mineral involved in much litigation
Definition
(Greek) fine fibrous mineral made into incombustible material, also ASBESTUS
seam
Clue
Mineral layer
ecolaw
Clue
Anti-fracking legislation, e.g.
epa
Clue
Org. concerned with fracking
erob
Clue
Fracking opening
gas
Clue
Natural ___ (subject of "fracking" in 2012)
Fuel that can be released by fracking
Definition
a state of matter

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