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What is limestone?**

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User IHulk
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2 Answers

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Limestone is a sedimentary rock made of calcium carbonate (CaCO3), composed mainly of calcium carbonate or dolomite, used as building material and in the making of cement.
answered
User Peter Pei Guo
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Answer: a hard sedimentary rock, composed mainly of calcium carbonate or dolomite, used as building material and in the making of cement.

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User Krunal Limbad
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