sedimentary

Fossiliferous Limestone

Sedimentary Calcium Carbonate (CaCO3)

AI-generated identification · may be incorrect

Hardness: 3 on Mohs scale; Color: Gray, tan, or white; Luster: Dull/earthy; Texture: Fine-grained matrix with visible fossil inclusions or crystalline patches; Specific Gravity: 2.5-2.7.

Hardness: 3 on Mohs scale
Color: Gray, tan, or white
Luster: Dull/earthy

Identified June 25, 2026More sedimentary →

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Physical properties

Hardness: 3 on Mohs scale; Color: Gray, tan, or white; Luster: Dull/earthy; Texture: Fine-grained matrix with visible fossil inclusions or crystalline patches; Specific Gravity: 2.5-2.7.

Formation & geological history

Formed in shallow, warm marine environments through the accumulation of organic debris such as shell, coral, and algal remains. Over millions of years, these sediments are buried and lithified.

Uses & applications

Used extensively in the construction industry for cement, road base, and building stone. It is also used as a soil conditioner and in lime production.

Geological facts

Limestone accounts for about 10% of the total volume of all sedimentary rocks. It often contains micro-fossils that help geologists date the rock layer.

Field identification & locations

Can be identified in the field by its effervescence (bubbles) when a drop of diluted hydrochloric acid or strong vinegar is applied. Frequently found in areas that were prehistoric seabeds.