sedimentary
Fossiliferous Limestone
Biogenic Sedimentary Rock (CaCO3)
AI-generated identification · may be incorrectHardness 3 on Mohs scale, color ranges from tan to grey, dull to earthy luster, compact crystal structure with visible fossil fragments, effervesces strongly in dilute hydrochloric acid.
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Physical properties
Hardness 3 on Mohs scale, color ranges from tan to grey, dull to earthy luster, compact crystal structure with visible fossil fragments, effervesces strongly in dilute hydrochloric acid.
Formation & geological history
Formed through the accumulation and compaction of organic carbonate debris like shells and coral in shallow marine environments over millions of years.
Uses & applications
Widely used in construction, production of lime and cement, aggregate for roads, and valued by fossil collectors.
Geological facts
Limestone often preserves ancient marine life, providing crucial data for paleontology and Earth history. Famous architectural monuments like the Great Pyramids of Giza incorporate this rock type.
Field identification & locations
Identify in the field by its light color, sedimentary layers, embedded fossil molds, and a vigorous fizz test when exposed to acid. Common worldwide in regions with ancient marine history.
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