fossil
Brachiopod Fossil
Phylum Brachiopoda (order potentially Spiriferida)
Hardness: 3 (if calcified) to 7 (if silicified); Color: tan to gray; Luster: dull to earthy; Shell-like structure with visible ribs or costae; bilateral symmetry across the valve face.
- Hardness
- 3 (if calcified) to 7 (if silicified)
- Color
- tan to gray
- Luster
- dull to earthy
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Physical properties
Hardness: 3 (if calcified) to 7 (if silicified); Color: tan to gray; Luster: dull to earthy; Shell-like structure with visible ribs or costae; bilateral symmetry across the valve face.
Formation & geological history
Formed in marine environments through the accumulation of sediment over ancient bivalve-like organisms. Typically found in Devonian, Silurian, or Carboniferous limestone and shale layers, ranging from 250 to 500 million years old.
Uses & applications
Scientific study, educational tools, and decor for fossil collectors.
Geological facts
Brachiopods are often called 'lamp shells' because they resemble ancient oil lamps. Despite looking like clams, they are biologically distinct and belong to their own phylum.
Field identification & locations
Found globally in sedimentary rock outcrops. Identify by the fan-like ribbing and 'beak' at the hinge point. Collectors look for complete shells that aren't overly worn by erosion.
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