Mafic to ultramafic (komatiitic) volcanic rocks

Mafic to ultramafic (komatiitic) volcanic rocks. Includes the Newton Lake Formation and Deer Lake sequence.
State Minnesota
Name Mafic to ultramafic (komatiitic) volcanic rocks
Geologic age Neoarchean
Lithologic constituents
Igneous > Volcanic > Mafic-volcanicmafic to ultramafic volcanic rocks
Igneous > Volcanic > Ultramafic > Komatiitemafic to ultramafic (komatiitic) volcanic rocks
Comments Part of the Supracrustal and hypabyssal intrusive rocks of the Wawa and Wabigoon subprovinces. Pre-D1 metavolcanic, metasedimentary, and hypabyssal intrusive rocks.

Jirsa, Mark A., Boerboom, Terrence J., Chandler, Val W., Mossler, John H., Runkel, Anthony C., and Setterholm, Dale R., 2011, S-21 Geologic Map of Minnesota-Bedrock Geology; Minnesota Geological Survey, State Map Series S-21. Scale 1:500,000.

NGMDB product
Counties Cook - Itasca - Lake - Saint Louis