Rock Identifier
Bryozoan Fossil (Phylum Bryozoa) — fossil
fossil

Bryozoan Fossil

Phylum Bryozoa

AI-generated identification · may be incorrect

Hardness varies around 3 on the Mohs scale depending on mineralization, typically gray to tan in color, dull to earthy luster, and exhibits distinct colonial branching or fenestrate structures.

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Physical properties

Hardness varies around 3 on the Mohs scale depending on mineralization, typically gray to tan in color, dull to earthy luster, and exhibits distinct colonial branching or fenestrate structures.

Formation & geological history

Formed through the accumulation of calcium carbonate skeletons of colonial aquatic invertebrates in marine environments, often dating from the Paleozoic era.

Uses & applications

Used primarily in paleontological research, educational displays, and by fossil collectors.

Geological facts

Bryozoans are often called moss animals and have a very long fossil record spanning over 480 million years.

Field identification & locations

Identified by distinctive delicate mesh-like or branching colony impressions on sedimentary rock surfaces, commonly found in limestone-rich formations worldwide.

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Bioclastic limestone, composed chiefly of calcite (CaCO₃)

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Porous limestone pebble

Calcite-rich limestone (primarily CaCO₃); exact identification is uncertain from the image

sedimentary
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Weathered fossil bone fragment (identification uncertain)

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

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