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Bois Blanc Formation | |
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Stratigraphic range: Middle Devonian | |
Type | Formation |
Underlies | Onondaga Limestone and Sylvania Sandstone |
Overlies | Garden Island Formation and Oriskany Sandstone |
Location | |
Region | Michigan and Ohio |
Country | United States |
The Bois Blanc Formation is a geologic formation in Michigan. It preserves fossils dating back to the Devonian period.