fossil
Fossilized Shell in Limestone
Carbonate sedimentary rock with Bivalvia or Brachiopoda remains
Hardness: 3-4 (matrix); Color: Chalky white to light grey; Luster: Dull/earthy; Texture: Fine-grained matrix with visible biological structures.
- Hardness
- 3-4 (matrix)
- Color
- Chalky white to light grey
- Luster
- Dull/earthy
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Physical properties
Hardness: 3-4 (matrix); Color: Chalky white to light grey; Luster: Dull/earthy; Texture: Fine-grained matrix with visible biological structures.
Formation & geological history
Formed in a shallow marine environment where calcium carbonate sediment accumulated over organic remains. Likely Paleozoic or Mesozoic era based on typical preservation.
Uses & applications
Educational specimens, scientific research, landscaping, and paleontology collections.
Geological facts
Limestone fossils often represent ancient sea floors. This specimen shows a partial cast or mold of a prehistoric marine organism, possibly a shell.
Field identification & locations
Check for reaction to dilute hydrochloric acid (it will fizz) and look for concentric growth lines or symmetrical shell patterns. Found in sedimentary basins worldwide.
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