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, dull to earthy luster, and exhibits effervescence when exposed to hydrochloric acid.
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Physical properties
Hardness of 3 on the Mohs scale, colors range from white to gray and tan, dull to earthy luster, and exhibits effervescence when exposed to hydrochloric acid.
Formation & geological history
Formed through the accumulation and compaction of organic remains like shells and coral, or chemical precipitation in marine environments over millions of years.
Uses & applications
Widely used in the construction industry for producing cement, road base, and dimension stone, as well as in agriculture to neutralize acidic soils.
Geological facts
Limestone frequently contains well-preserved fossils of ancient marine organisms and forms spectacular cave systems through dissolution by acidic groundwater.
Field identification & locations
Easily identified in the field by its characteristic reaction with acid and relatively soft texture, and is globally abundant in sedimentary basins.
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Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
fossil
Sandstone or Siltstone
Arenite (if sandstone)
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Sandstone
Arenite
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Shale
Shale (clastic sedimentary rock)
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Shale (or Mudstone/Siltstone)
Sedimentary Mudrock (SiO2, Al2O3 base with clay minerals)
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