fossil

Fossil gastropod shell

Fossilized gastropod; likely a spiral marine snail, taxonomic identification uncertain from the image

AI-generated identification · may be incorrect

Preserved coiled shell with visible growth lines and a cream-to-brown mineralized surface. Original aragonite may have recrystallized to calcite; Mohs hardness about 3–4, nonmetallic luster, and curved shell structure rather than mineral cleavage.

Identified August 20, 2026More fossil →

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Physical properties

Formation & geological history

Formed when a marine gastropod was buried in sediment and its shell was mineralized or replaced during diagenesis, commonly in limestone or shale. Its geological age cannot be determined without locality and matrix information.

Uses & applications

Primarily a teaching, collecting, and decorative specimen; polished or prepared fossils may be sold as curiosities, but it has no significant industrial use.

Geological facts

The spiral growth pattern records successive shell growth, while brown coloration commonly comes from iron oxides or sediment staining. The specimen appears partly worn or matrix-covered.

Field identification & locations

Identify it by the logarithmic spiral, repeated growth ribs, and hollow/coiled shell form; common fossil gastropods occur in marine limestones worldwide. Avoid acids and aggressive cleaning, which can damage carbonate shell material.