Sioux Quartzite

Quartzite, mudstone, and local conglomerate of fluvial and marine origin (~1,760 to 1,630 Ma; 1,902 ± 55 Ma rhyolite pebble in basal conglomerate).
State Minnesota
Name Sioux Quartzite
Geologic age Paleoproterozoic
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Bed)
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Minor
Sedimentary > Clastic > Conglomerate (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 Brown - Cottonwood - Jackson - Lincoln - Lyon - Martin - Murray - Nicollet - Nobles - Pipestone - Rock - Watonwan