The clue "Rock source of petroleum" last appeared in the Newsday.com crossword on October 27, 2020. The correct answer for this puzzle is "SHALE", a 5-letter word.
Solution SHALE is 5 letters long. So far we haven´t got a solution of the same word length.
There is 1 solutions. The longest is SHALE with 5 letters, and the shortest is SHALE with 5 letters.
Not at the moment. Currently trending: Bizarre, slush, Costume, Smudge and Secular.
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The solution is 5 letters long.