Mt. Simon Sandstone (IACAm;0)

Mt. Simon Sandstone

Subcrops beneath Mississippi River alluvium in northeastern Allamakee County; surface exposures absent. Overlies erosional surface on Precambrian granitic basement rocks. Primary lithology: sandstone, very fine to very coarse grained, part iron-stained. Minor: shale, silty to sandy, gray, red, green; quartz granules; granitic pebbles. Thicknesses: 365-405 ft (111-123 m).

State	Iowa
Name	Mt. Simon Sandstone
Geologic age	Middle Cambrian undifferentiated
Lithologic constituents	Major Sedimentary > Clastic > Sandstone (Bed)very fine to very coarse grained, part iron-stained Incidental Sedimentary > Clastic > Mudstone > Shale (Bed)silty to sandy, gray, red, green
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	Allamakee

Mt. Simon Sandstone

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.