Middle and Upper Cambrian

Sandstone, siltstone, and shale; includes the Wonewoc Sandstone, Eau Claire Formation, and Mt. Simon Sandstone.
State Minnesota
Name Middle and Upper Cambrian
Geologic age Middle and Upper Cambrian
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
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 Anoka - Blue Earth - Brown - Carver - Chisago - Dakota - Fillmore - Goodhue - Hennepin - Houston - Isanti - Jackson - Kanabec - Le Sueur - McLeod - Martin - Meeker - Mille Lacs - Nicollet - Pine - Scott - Sherburne - Sibley - Wabasha - Washington - Watonwan - Winona - Wright