sedimentary
Limestone
Calcite rock (CaCO3)
AI-generated identification · may be incorrectHardness 3 on Mohs scale, colors range from white to gray and tan, dull to earthy luster, massive crystal structure with no distinct cleavage.
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Physical properties
Hardness 3 on Mohs scale, colors range from white to gray and tan, dull to earthy luster, massive crystal structure with no distinct cleavage.
Formation & geological history
Formed from the accumulation of skeletal fragments of marine organisms or chemical precipitation, typically in shallow marine environments over millions of years.
Uses & applications
Extensively used in construction as aggregate, production of cement, agricultural soil conditioning, and in the manufacturing of glass and paper.
Geological facts
Limestone often contains well-preserved fossils and dissolves slowly in acidic water, creating extensive cave systems and karst topography worldwide.
Field identification & locations
Easily identified by its characteristic fizz when tested with dilute hydrochloric acid due to the presence of calcium carbonate.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Shale
Fissile Sedimentary Rock
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Arenite
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Clastic sedimentary rock
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