| Copper Harbor Conglomerate | |
| Type: | Formation |
| Age: | Proterozoic |
| Period: | Proterozoic |
| Region: | Michigan and Wisconsin |
| Unitof: | Oronto Group |
| Underlies: | Nonesuch Shale |
| Overlies: | Precambrian crystalline basement rocks |
The Copper Harbor Conglomerate is a geologic formation in Michigan. It is part of the larger Oronto Group and its formation dates to the Stenian period of the Proterozoic.