sedimentary
Fossiliferous Limestone
Calcium Carbonate (CaCO3) with organic fossils
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, typically gray to tan or beige in color with a dull to earthy luster, featuring visible fossil fragments and a cryptocrystalline structure.
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Physical properties
Hardness of 3 on the Mohs scale, typically gray to tan or beige in color with a dull to earthy luster, featuring visible fossil fragments and a cryptocrystalline structure.
Formation & geological history
Formed through the accumulation and compaction of organic carbonate debris, shells, and coral in shallow marine environments over millions of years.
Uses & applications
Widely used in the construction industry as crushed stone, dimension building stone, and as a primary raw material in the manufacturing of Portland cement.
Geological facts
Limestone often preserves delicate ancient marine ecosystems and prehistoric life forms as fossils, revealing Earth's evolutionary history.
Field identification & locations
Readily identified in the field by its characteristic effervescence when exposed to dilute hydrochloric acid; found globally in sedimentary basins.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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