sedimentary
Fossiliferous Limestone
Calcareous sedimentary rock (CaCO3)
AI-generated identification · may be incorrectHardness 3 on Mohs scale, color ranges from grey to tan, dull to earthy luster, cryptocrystalline structure with visible fossil fragments, exhibits good cleavage in calcite crystals, specific gravity around 2.7.
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Physical properties
Hardness 3 on Mohs scale, color ranges from grey to tan, dull to earthy luster, cryptocrystalline structure with visible fossil fragments, exhibits good cleavage in calcite crystals, specific gravity around 2.7.
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
Used extensively in construction, cement production, agriculture for soil neutralization, and aggregate base for roads.
Geological facts
Limestone often preserves ancient marine life, providing crucial insight into prehistoric ecosystems and past climate change.
Field identification & locations
Easily identified by its reaction with dilute hydrochloric acid, which produces effervescence. Commonly found in sedimentary basins and ancient sea beds worldwide.
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Fossil-bearing concretion, possibly containing a fossil shell or other organic inclusion
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Sedimentary
Fossiliferous Sedimentary Rock
Sedimentary limestone with invertebrate fossil imprint
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Shale
Fissile Sedimentary Rock
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Clastic sedimentary rock
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