Crossword puzzle clue "brittle shale say"

Here are the possible solutions for brittle shale say clue

Answer
Clue
Relevancy
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
longas
Clue
Features of shale and slate?
Definition
LONGA, (Latin) a long note
oil
Clue
Shale extract
Definition
to lubricate with a greasy substance
slaty
Clue
Made of shale.

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