Metagabbro

Mafic to ultramafic bodies defined and delineated principally by positive magnetic and gravity anomalies; includes diorite bodies. Comagmatic with unit Xmi
State Michigan
Name Metagabbro
Geologic age Early Proterozoic
Lithologic constituents
Major
Metamorphic > Metaigneous > Metaintrusive > Metagabbromafic to ultramafic bodies defined and delineated principally by positive magnetic and gravity anomalies; includes diorite bodies.
Igneous > Plutonic > Ultramaficmafic to ultramafic bodies defined and delineated principally by positive magnetic and gravity anomalies; includes diorite bodies.
Minor
Igneous > Plutonic > Dioritic > Dioritemafic to ultramafic bodies defined and delineated principally by positive magnetic and gravity anomalies; includes diorite bodies.
Comments This occurs as a sliver in northwestern Michigan, just south of the Niagara Fault zone (in the Pembine-Wausau terrane.)
References
NGMDB product
Counties Dickinson - Menominee