sedimentary

Fossiliferous Limestone

Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 (Mohs scale); Color: White, cream, or light tan; Luster: Dull to earthy; Crystal structure: Trigonal (microcrystalline); Features: High porosity and contains visible fossil imprints or voids.

Hardness: 3 (Mohs scale)
Color: White, cream, or light tan
Luster: Dull to earthy

Identified June 14, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in marine environments through the accumulation of shell, coral, and algal debris. The holes indicate biological activity or the leaching of minerals over millions of years (Paleozoic to Cenozoic eras).

Uses & applications

Used primarily in the construction industry as an aggregate, architectural stone, or for the production of lime and cement. Small specimens are popular for amateur fossil collecting.

Geological facts

Limestone covers about 10% of the Earth's total land surface. This specific piece shows 'vuggy' porosity, common in weathered coastal or riverbed specimens.

Field identification & locations

Identify in the field by checking for a reaction (fizzing) with diluted hydrochloric acid. Commonly found near ancient seabeds, riverbanks, or quarries. Look for small holes or impressions of organic life.