Bayfield group
| 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. It is named for the village of Bayfield, Wisconsin, but was once known as Western Lake Superior Sandstone.
Prior to the 1900s, Bayfield group sandstone was also variously named Lake Superior Sandstone, brownstone, or redstone, 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.