sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, typically gray to white in color, with a dull to earthy luster and fine-grained crystal structure.
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Physical properties
Hardness of 3 on the Mohs scale, typically gray to white in color, with a dull to earthy luster and fine-grained crystal structure.
Formation & geological history
Formed by the accumulation of skeletal fragments of marine organisms or chemical precipitation, primarily in shallow marine environments over millions of years.
Uses & applications
Widely used in construction as building stone, aggregate in concrete, and in the manufacturing of cement and agricultural lime.
Geological facts
Limestone frequently contains well-preserved fossils and dissolves in acidic water, creating spectacular cave systems and karst topography.
Field identification & locations
Easily identified by its vigorous effervescence when exposed to dilute hydrochloric acid. It is globally abundant in sedimentary basins.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Fissile Sedimentary Rock
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