Crossword puzzle clue "shale layers"

Here are the possible solutions for shale layers clue

Answer
Clue
Relevancy
strata
Clue
Shale layers
laminations
Clue
Layers upon layers
Definition
LAMINATION, the act of laminating
onion
Clue
It has layers upon layers
Definition
to apply an onion, an edible bulb, to
crispyrock
Clue
Brittle shale, say?
kerogen
Clue
Source of shale oil
Oil-producing matter in shale
Definition
a kind of bitumen found in oil shale
kerosene
Clue
Shale oil product
Definition
a fuel oil, also KERO, KEROSINE
kolm
Clue
Swedish shale

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