sedimentary
Fossil-bearing limestone (possible shell fossil)
Fossiliferous limestone, composed mainly of calcite (CaCO₃)
AI-generated identification · may be incorrectThe specimen appears brown-gray and rough, with a pale, ribbed fossil-like imprint. Limestone is typically Mohs 3, with a calcite cleavage and a dull to slightly crystalline luster; the photo does not establish its exact composition.
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Physical properties
The specimen appears brown-gray and rough, with a pale, ribbed fossil-like imprint. Limestone is typically Mohs 3, with a calcite cleavage and a dull to slightly crystalline luster; the photo does not establish its exact composition.
Formation & geological history
Forms when carbonate mud and shell or skeletal remains accumulate and lithify in marine settings. Its geological age cannot be determined from the image.
Uses & applications
Used as building and landscaping stone, aggregate, and cement feedstock; intact fossil details can make pieces appealing to collectors.
Geological facts
Fossiliferous limestone preserves evidence of ancient marine life, including shells and other hard parts.
Field identification & locations
Look for visible fossil fragments or impressions in a carbonate-rich matrix; limestone often fizzes with dilute acid. Common worldwide in former marine sedimentary basins.
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