| Bush Bay Formation | |
| Type: | Formation |
| Age: | Silurian |
| Period: | Silurian |
| Unitof: | Engadine Group |
| Underlies: | Pointe aux Chenes Formation |
| Overlies: | Rapson Creek Formation |
The Bush Bay Formation is a geologic formation in Michigan. It preserves fossils dating back to the Silurian period.