Oldest gneiss complex - Migmatite

Wind River Range--Includes large bodies of metagabbro. Overprint pattern indicates area of migmatite related to emplacement of 2,600-Ma granite.
State Wyoming
Name Oldest gneiss complex - Migmatite
Geologic age Early Archean
Lithologic constituents
Metamorphic > Migmatite
Metamorphic > Metaigneous > Metaintrusive > Metagabbro
Comments This unit represents the 'overprint pattern' on unit Ugn. Unit description suggests these are migmatic regions.
NGMDB product
Counties Fremont - Sublette