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Preferred Term:

limestone

Definition:
A sedimentary rock made mostly of the mineral calcite (calcium carbonate). Limestone is usually formed from shells of once-living organisms or other organic processes, but may also form by inorganic precipitation.
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URI:
https://lod.nal.usda.gov/nalt/22259
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RDF/XMLCreated 2006-01-19, last modified 2018-08-16