sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, typically gray to tan in color, with a dull to earthy luster and a massive or microcrystalline structure.
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Physical properties
Hardness of 3 on the Mohs scale, typically gray to tan in color, with a dull to earthy luster and a massive or microcrystalline structure.
Formation & geological history
Formed through the accumulation of shell, coral, algal, and fecal debris, or via chemical precipitation of calcium carbonate from water in marine environments.
Uses & applications
Widely used in the manufacturing of cement, as a building stone, in agriculture for neutralizing soil acidity, and as a aggregate in road construction.
Geological facts
Limestone frequently contains well-preserved fossils of ancient marine organisms and dissolves easily in acidic water, creating caves and karst topography.
Field identification & locations
Identified easily by its reaction to dilute hydrochloric acid, which causes it to effervesce and fizz vigorously.
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