Crossword puzzle clue "petroleum source"

Here are the possible solutions for petroleum source clue

Answer
Clue
Relevancy
oildeposit
Clue
Underground petroleum source
oilsand
Clue
Alberta petroleum source
shale
Clue
Petroleum source
Possible source of petroleum
amoco
Clue
Petroleum giant
Big name in petroleum
Petroleum company
1998 British Petroleum acquisition

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