Did you know Limestone is used in Cheerios?


limestone

Limestone is an essential mineral commodity of national importance. Some of the many products made using limestone are shown in this photograph—breakfast cereal, paint, calcium supplement pills, a marble tabletop, antacid tablets, high-quality paper, white roofing granules, and Portland cement. (USGS photograph; use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.)

Limestone, as used by the minerals industry, is any rock composed mostly of calcium carbonate (CaCO3). Although limestone is common in many parts of the United States, it is critically absent from some. Limestone is used to produce Portland cement, as aggregate in concrete and asphalt, and in an enormous array of other products, making it a truly versa­tile commodity. Portland cement is essential to the building industry, but despite our Nation’s abundance of limestone, there have been cement shortages in recent years. These have been caused in part by a need to find new areas suitable for quarrying oper­ations. To help manage our Nation’s resources of such essential mineral commodities, the U.S. Geological Survey (USGS) provides crucial data and scientific information to industry, policymakers, and the public. Read more…

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