sedimentary
Limestone
Calcium carbonate (CaCO3)
AI-generated identification · may be incorrectMohs hardness of 3, color ranges from white to gray and tan, dull to earthy luster, fine-grained crystal structure, exhibits good cleavage.
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Physical properties
Mohs hardness of 3, color ranges from white to gray and tan, dull to earthy luster, fine-grained crystal structure, exhibits good cleavage.
Formation & geological history
Formed through the accumulation and compaction of organic remains like shells and coral, or chemical precipitation in marine environments over millions of years.
Uses & applications
Extensively used in construction as a building material, in the production of cement and lime, and for agricultural soil conditioning.
Geological facts
Limestone frequently contains well-preserved fossils of ancient marine life and is susceptible to dissolution by acidic water, forming extensive cave systems.
Field identification & locations
Easily identified by its characteristic effervescence when exposed to dilute hydrochloric acid; commonly found in sedimentary basins worldwide.
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