Category:Detroit River Group
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Subcategories
This category has only the following subcategory.
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Categories:
- Geologic groups of the United States
- Devonian geology of the United States
- Fossil bearing geologic formations in the United States
- Geologic formations in Indiana
- Devonian geology of Indiana
- Geologic groups in Michigan
- Devonian geology of Michigan
- Geologic groups in Ohio
- Devonian geology of Ohio
- Geologic formations in Ontario
- Devonian geology of Canada