sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness 3 on Mohs scale, white to gray or tan color, earthy to vitreous luster, fine-grained to coarse crystal structure, excellent cleavage.
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Physical properties
Hardness 3 on Mohs scale, white to gray or tan color, earthy to vitreous luster, fine-grained to coarse crystal structure, excellent cleavage.
Formation & geological history
Formed through the accumulation and compaction of organic remains like shells and coral, or chemical precipitation in shallow marine environments over millions of years.
Uses & applications
Widely used in construction as building stone, aggregate in concrete, production of lime and cement, and in agricultural soil treatment.
Geological facts
Limestone frequently contains well-preserved fossils and dissolves in acidic solutions to form extensive cave systems and karst topography.
Field identification & locations
Easily identified in the field by its characteristic effervescence when cold dilute hydrochloric acid is applied.
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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
fossil
Sandstone or Siltstone
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Sandstone
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Shale
Shale (clastic sedimentary rock)
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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