fossil

Fossil brachiopod shell

Brachiopoda; exact genus and species cannot be determined from the image

AI-generated identification · may be incorrect

Ribbed, bilaterally symmetrical shell fossil, gray-brown with pale mineralized ridges. Original shell composition and hardness are uncertain; fossils are commonly preserved as calcite or replaced by silica or other minerals.

Identified September 28, 2026More fossil →

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Physical properties

Formation & geological history

A marine brachiopod shell was buried in seafloor sediment and fossilized as the sediment lithified; age cannot be determined from appearance alone.

Uses & applications

Primarily a teaching, display, and collecting specimen; brachiopod fossils are also used in paleontological and stratigraphic research.

Geological facts

Brachiopods are marine animals, not clams: their two shell halves are arranged dorsally and ventrally rather than left and right.

Field identification & locations

Look for the ribbed paired valves and symmetry across the shell’s central line. Brachiopod fossils occur in marine sedimentary rocks worldwide; identifying the species or age requires locality and finer details.