sedimentary

Fossiliferous Sandstone (with Quartz patch)

Sedimentary Sandstone with Silicified Shell Fragments

AI-generated identification · may be incorrect

Hardness: 6-7 (Mohs scale), Color: Light brown to yellowish-tan matrix with grayish-white quartz/calcite inclusions and fossil fragments, Luster: Dull to earthy matrix with vitreous quartz inclusions, Texture: Fine to medium granular texture with visible fossil shell debris

Identified July 23, 2026More sedimentary →

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Physical properties

Formation & geological history

Formed in ancient shallow marine or coastal beach environments through the accumulation, compaction, and cementation of sand grains along with broken shell fragments. Over millions of years, silica or calcite cemented the sediments into solid rock.

Uses & applications

Commonly used as construction material, flagstone, landcaping stone, and as educational specimens demonstrating sedimentary processes and ancient marine environments.

Geological facts

Sandstone with embedded shell fragments serves as an excellent environmental indicator, revealing details about past sea levels, wave energy, and marine life from millions of years ago.

Field identification & locations

Identified by its grainy, sand-like texture, tan or brownish matrix, and embedded lighter inclusions including shell fossils and crystalline quartz patches. Commonly found along riverbeds, coastal beaches, and sedimentary rock formations worldwide.