IGS staff recently completed 10 map products as part of the US Geological Survey STATEMAP program. The project included bedrock and surficial geologic mapping in Lee and Muscatine counties, a surficial map of the Outlet Creek watershed in Buena Vista County, and a groundwater vulnerability map of Benton County. These maps can be found on the IGS publications page (search for OFM-22-1 through OFM-22-10)

low resolution image of bedrock elevation of Lee County map