SEDIS - Thesaurus
Lucas Formation  | |
|---|---|
| RT | Cretaceous |
| Middle Devonian | |
| Ontario | |
| Ohio | |
| Michigan | |
| Cuba | |
| Detroit River Group | |
| SN | In Detroit River Group. Ohio, SE Michigan and Ontario. Includes Richfield Member. Also a Cretaceous formation in Cuba. Indexed with ages as applicable. Added to Thesaurus in 1989. |
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