OILY ROCK Crossword Clue
OILY ROCK Crossword Clue
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Crossword Puzzle Infos
OILY ROCK is a term used to describe shale, which is a type of sedimentary rock composed of clay and silt-sized particles. It is characterized by its fissility, which means it can be easily split into thin layers. Shale is also known for its high oil content, which makes it an important source of petroleum.