sedimentary
Limestone
Calcium Carbonate (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, colors range from white to gray and tan, earthy to vitreous luster, and effervesces in dilute hydrochloric acid.
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Physical properties
Hardness of 3 on the Mohs scale, colors range from white to gray and tan, earthy to vitreous luster, and effervesces in dilute hydrochloric acid.
Formation & geological history
Formed through the accumulation of skeletal fragments of marine organisms or chemical precipitation in shallow marine environments over millions of years.
Uses & applications
Widely used in construction, production of cement, agriculture to neutralize acidic soils, and as dimension stone.
Geological facts
Limestone often contains well-preserved fossils and forms dramatic karst landscapes featuring caves, sinkholes, and underground rivers.
Field identification & locations
Easily identified by its reaction to acid and layered sedimentary appearance, commonly found in quarries and regional sedimentary rock formations worldwide.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Sandstone or Siltstone
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Shale
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Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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