Migmatitic gneiss and amphibolite (Late to Early Archean)

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.
State Wisconsin
Name Migmatitic gneiss and amphibolite (Late to Early Archean)
Geologic age Archean
Lithologic constituents
Major
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
Minor
Igneous > Plutonic > Granitic > GraniteIncludes granite of Late Archean age that transgresses gneisses and amphibolite.
Comments Continental margin assemblage (north of Niagara Fault)
References
NGMDB product
Counties Ashland - Bayfield - Iron - Price - Sawyer - Vilas - Washburn