sedimentary
Fossiliferous Limestone
Biogenic Limestone
AI-generated identification · may be incorrectHardness: 3 on Mohs scale, Color: Gray with tan patches, Luster: Dull to earthy, Crystal Structure: Microcrystalline calcite, Cleavage: Rhombohedral.
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Physical properties
Hardness: 3 on Mohs scale, Color: Gray with tan patches, Luster: Dull to earthy, Crystal Structure: Microcrystalline calcite, Cleavage: Rhombohedral.
Formation & geological history
Formed in shallow marine environments through the accumulation and compaction of skeletal fragments from organisms over millions of years.
Uses & applications
Used in the construction industry for cement, road base, and dimension stone, as well as an educational specimen for paleontology.
Geological facts
Limestone often preserves delicate ancient marine fossils and covers extensive geological regions worldwide.
Field identification & locations
Identified easily by its reaction to dilute hydrochloric acid (effervescence) and visible fossil fragments; commonly found in sedimentary basins.
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