Lucas Formation
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The Lucas Formation is a geologic formation in U.S. states of Michigan and Ohio. It preserves fossils dating back to the middle Devonian period.
Fossil content
| Cnidarians | |||||
|---|---|---|---|---|---|
| Genus | Species | Presence | Material | Notes | Images |
| Siphonophrentis | S. gigantea | A coral |
- Various Contributors to the Paleobiology Database. .