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  • what are the uses of Sedimentary rocks? | Yahoo Answers

    Sep 17, 2008 · Best Answer: Sedimentary rocks such as limestone can be used for a variety of purposes including highway construction and building stones, and, in the classroom, as chalk. Rocks such as coal and oil shale can be processed for their valuable, energy-containing carbon compounds. Rock gypsum can be ground up and used in a number of ways, including plaster and wall board.