| Bayfield group | |
|---|---|
| Type | Group |
| Unit of | Keweenawan Supergroup |
| Sub-units | Chequamegon Sandstone Devils Island Sandstone Orienta Sandstone |
| Overlies | Oronto Group |
| Location | |
| Region |  Wisconsin |
| Country |  United States |
The Bayfield group is a quartz sandstone found in Wisconsin along the Lake Superior coast.[1] It is named for the village of Bayfield, Wisconsin,[2] but was once known as Western Lake Superior Sandstone.[1]
Prior to the 1900s, Bayfield group sandstone was also variously named Lake Superior Sandstone, brownstone, or redstone,[3] and prefixed by the quarry location. The name was changed to the Bayfield group as its relation to Jacobsville Sandstone (once known as Lake Superior Sandstone) is uncertain.[1]