|Name||Migmatitic gneiss and amphibolite (Late to Early Archean)|
Metamorphic > GneissMigmatitic gneiss. Varied gneisses of mostly unknown age in cores of gneiss domes and fault-bounded uplifts (Archean gneiss terranes). Except for the Watersmeet dome (Late to Early Archean); all dated rocks are Late Archean. Includes granite of Late Archean age that transgresses gneisses and amphibolite.
Metamorphic > AmphiboliteMigmatitic amphibolite
Igneous > Plutonic > Granitic > GraniteIncludes granite of Late Archean age that transgresses gneisses and amphibolite.
|Comments||Continental margin assemblage (north of Niagara Fault)|
|Counties||Ashland - Bayfield - Iron - Price - Sawyer - Vilas - Washburn|