sedimentary
Fossiliferous Limestone
Limestone (CaCO3 with Bioclasts)
Hardness: 3 (Mohs scale), Color: Pinkish-red matrix with white fossil inclusions, Luster: Dull/Earthy, Structure: Fine-grained matrix with visible skeletal fragments
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Physical properties
Hardness: 3 (Mohs scale), Color: Pinkish-red matrix with white fossil inclusions, Luster: Dull/Earthy, Structure: Fine-grained matrix with visible skeletal fragments
Formation & geological history
Formed in warm, shallow marine environments from the accumulation of calcium carbonate and organic remains like shells and coral. The reddish tint often suggests presence of iron oxides (hematite).
Uses & applications
Used primarily in construction (aggregate, cement), as architectural stone, and for agricultural soil conditioning.
Geological facts
This specimen contains visible fossil fragments, potentially crinoids or shell pieces, which act as a record of ancient marine life. Limestone preserves more fossils than any other rock type.
Field identification & locations
Identified by its reaction to dilute hydrochloric acid (fizzing) and the presence of visible bio-clasts. Commonly found in areas that were once prehistoric seafloors.
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