Sioux Quartzite (IAXs;0)

Sioux Quartzite

Crops out in northwestern Lyon County; buried beneath Cretaceous strata to south and east. Primary lithology: quartzite, fine to coarse grained, pink, red, purple (low-grade metamorphic rock). Minor: conglomerate; claystone/argillite, red. Estimated thickness <500 ft (150 m).

State	Iowa
Name	Sioux Quartzite
Geologic age	Lower Proterozoic
Lithologic constituents	Major Metamorphic > Metasedimentary > Metaclastic > Quartzitefine to coarse grained, pink, red, purple (low-grade metamorphic rock) Incidental Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Clastic > Mudstone > Claystone (Bed)claystone/argillite, red
References	Witzke, Brian J., Anderson, Raymond R., and Pope, John P., 2010, Iowa Geological and Water Survey, DNR, Bedrock Geologic Map of Iowa, OFM-2010-1. Scale 1:500,000.
NGMDB product	NGMDB product page for 96753
Counties	Lyon

Sioux Quartzite

Witzke, Brian J., Anderson, Raymond R., and Pope, John P., 2010, Iowa Geological and Water Survey, DNR, Bedrock Geologic Map of Iowa, OFM-2010-1. Scale 1:500,000.