Limestone Cobble
Marine limestone
A pale, pitted cobble of Florida's bedrock, often drilled by boring clams and worms.
- Typical size
- 1–8 in
- How often it turns up
- Common
- Collecting
- Check local rules
- Handling
- Safe to handle
Loose cobbles are usually fine; do not break shoreline outcrop.
How to tell it apart
- Pale cream to grey, pitted and pocked
- Fizzes faintly in vinegar
- Round drill holes from boring bivalves
Found one?
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