Winthrop
Past ProducerUndergroundUSGS MRDS
Location
| State | Michigan |
| County | Marquette |
| Coordinates | 46.45310, -87.69172 |
Commodities
| Tertiary | Iron |
Mine Details
| Status | Past Producer |
| Type | Underground |
| First Production | 1870 |
| Discovery Year | 1869 |
| Data Source | USGS MRDS |
| Source ID | 10146135 |