Rock Identifier
Fossil fish in limestone (Indeterminate fossil teleost fish preserved in calcareous sedimentary matrix) — fossil
fossil

Fossil fish in limestone

Indeterminate fossil teleost fish preserved in calcareous sedimentary matrix

AI-generated identification · may be incorrect

A flattened, dark-brown fish impression/skeleton in a pale tan, fine-grained matrix. The matrix is likely calcite-rich limestone; the fossil’s mineral replacement and exact hardness cannot be determined from the image.

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Physical properties

A flattened, dark-brown fish impression/skeleton in a pale tan, fine-grained matrix. The matrix is likely calcite-rich limestone; the fossil’s mineral replacement and exact hardness cannot be determined from the image.

Formation & geological history

The fish was buried in fine sediment that later lithified and preserved its remains; age and locality cannot be established from appearance alone. Similar fossils occur in deposits ranging from the Jurassic to the Eocene.

Uses & applications

Primarily a display and educational collectible; fossils are also used in paleontological research.

Geological facts

The elongated body and traces of fin or skeletal structures are visible, though the specimen is weathered and not diagnostic enough for species identification.

Field identification & locations

Look for a coherent body outline and repeated skeletal or fin structures embedded in natural rock, rather than a surface image. A locality label and expert examination are needed to identify the fish and date; value is commonly about $10–$100, with exceptional documented specimens worth more.

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Fossiliferous limestone (likely a crinoidal or shell-fragment limestone)

Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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Weathered fossil bone fragment (identification uncertain) (Fossilized bone; exact taxon and mineral composition cannot be determined from the image) — fossil

Weathered fossil bone fragment (identification uncertain)

Fossilized bone; exact taxon and mineral composition cannot be determined from the image

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