Knife Lake Group, hornblende-phyric volcanic flows, breccia, and tuff.

Hornblende-phyric volcanic flows, breccia, and tuff.
State Minnesota
Name Knife Lake Group, hornblende-phyric volcanic flows, breccia, and tuff.
Geologic age Neoarchean
Lithologic constituents
Major
Igneous > Volcanic > Alkalic-volcanic (Flow, Volcaniclastic-volcanic breccia, Pyroclastic-tuff)hornblende-phyric
Comments Part of the Supracrustal and hypabyssal intrusive rocks of the Wawa and Wabigoon subprovinces. Post-D1/pre-D2 alkalic volcanic and successor-basin deposits.
References

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 - Lake - Saint Louis