20231213 16503400 1.0 TRUE Bedrock Faults Currently known/interpreted fault zones in Iowa, that demonstrate offset of geologic units in exposure or subsurface data, and have sufficient control to allow them to be mapped at a scale of 1:24,000 or smaller. None of the faults in this data set display movements in the overlying Cretaceous bedrock units or unconsolidated materials (i.e. Quaternary).