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Bob, Limestone is composed of the mineral calcite which is composed of the elements calcium, carbon, and oxygen. The most common natural process responsible for limestone formation
http://en.allexperts.com/q/Geology-1359/2009/7/Lim...
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Economic reasons: there's lots of it, and it's relatively easy to quarry. In addition, it has other uses (such as providing lime for concrete) which increase its economic viability.
http://uk.answers.yahoo.com/question/index?qid=201...
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stone blocks for building materials - see links below Source(s): http://www.lovellpurbeck.com/home.aspx?g… http://en.wikipedia.org/wiki/Purbeck_Mar… http://en.wikipedia.org
http://uk.answers.yahoo.com/question/index?qid=201...
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I live on Limestone DR!
http://answers.yahoo.com/question/index?qid=201209...
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