sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, colors range from white to gray and tan, dull to earthy luster, and reacts strongly with hydrochloric acid.
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Physical properties
Hardness of 3 on the Mohs scale, colors range from white to gray and tan, dull to earthy luster, and reacts strongly with hydrochloric acid.
Formation & geological history
Formed from the accumulation of skeletal fragments of marine organisms or chemical precipitation in shallow marine environments over millions of years.
Uses & applications
Extensively used in construction, manufacturing of cement, production of lime, and agricultural soil treatment.
Geological facts
Limestone frequently preserves fossils of ancient sea life and makes up about 10 percent of the total volume of all sedimentary rocks on Earth.
Field identification & locations
Easily identified by its characteristic effervescence when exposed to acid; commonly found worldwide in sedimentary basins and ancient sea beds.
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