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STATEMAP: Surficial Geologic Maps of Nebraska - University of Nebraska …
STATEMAP | Geology - University of Nebraska–Lincoln
Geology of Nebraska - Wikipedia
National Geologic Map Database - USGS
Geology Related GIS Data - University of Nebraska–Lincoln
USGS Mineral Resources On-Line Spatial Data
Surficial geologic map of the greater Omaha area, Nebraska and …
Nebraska Geology - University of Nebraska–Lincoln
Geologic Maps and Charts | Maps & More | Nebraska Maps
Nebraska Bedrock Geology