sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, colors range from white to gray and yellowish-brown, earthy to vitreous luster, and effervesces strongly in dilute hydrochloric acid.
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Physical properties
Hardness of 3 on the Mohs scale, colors range from white to gray and yellowish-brown, earthy to vitreous luster, and effervesces strongly in dilute hydrochloric acid.
Formation & geological history
Formed through the accumulation of organic debris like shells and coral or chemical precipitation of calcium carbonate in shallow marine environments over millions of years.
Uses & applications
Widely used in the manufacture of cement, as a building stone, in agriculture to neutralize acidic soils, and in road construction.
Geological facts
Limestone frequently contains well-preserved fossils and forms dramatic karst landscapes, including extensive cave systems with stalactites and stalagmites.
Field identification & locations
Easily identified in the field by its reaction with acid and relatively soft texture; commonly found in sedimentary basins worldwide.
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