sedimentary
Fossiliferous Limestone
Calcite-cemented biogenic sedimentary rock (CaCO3)
AI-generated identification · may be incorrectHardness of 3 on the Mohs scale, tan to gray color, dull to earthy luster, and reacts with dilute hydrochloric acid.
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Physical properties
Hardness of 3 on the Mohs scale, tan to gray color, dull to earthy luster, and reacts with dilute hydrochloric acid.
Formation & geological history
Formed from the accumulation and lithification of marine organism shells and skeletal fragments over millions of years.
Uses & applications
Used in construction, cement production, agriculture, and as collector specimens.
Geological facts
The distinct hollow molds and ribbed impressions indicate ancient brachiopod fossils preserved within the matrix.
Field identification & locations
Identify by visible fossil molds, calcareous composition, and effervescence with acid; commonly found in ancient shallow marine sedimentary deposits.
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