sedimentary

Fossiliferous Limestone

Fossiliferous Limestone (containing bioclasts)

AI-generated identification · may be incorrect

Hardness: 3-4 (Mohs scale); Color: Tan, brown, and grey; Luster: Dull/Earthy; Structure: Contains visible marine fossils (likely crinoid stems or shell fragments); Composition: Primarily Calcium Carbonate (CaCO3).

Hardness: 3-4 (Mohs scale)
Color: Tan, brown, and grey
Luster: Dull/Earthy

Identified June 5, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in shallow marine environments over millions of years through the accumulation and lithification of organic debris such as shell fragments and coral.

Uses & applications

Used in construction as building stone, cement manufacture, and gravel. Purely decorative specimens are kept by enthusiasts and used in educational settings.

Geological facts

Limestone covers about 10% of the total surface area of all sedimentary rocks on Earth. This specific specimen shows high fossil density, indicating a rich ancient marine ecosystem.

Field identification & locations

Identify by looking for visible shell or organism remnants; it will react (fizz) when exposed to a weak acid like vinegar. Commonly found in areas that were once prehistoric seafloors.