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  1. STATEMAP: Surficial Geologic Maps of Nebraska - University of Nebraska

  2. STATEMAP | Geology - University of Nebraska–Lincoln

  3. Geology of Nebraska - Wikipedia

  4. National Geologic Map Database - USGS

  5. Geology Related GIS Data - University of Nebraska–Lincoln

  6. USGS Mineral Resources On-Line Spatial Data

  7. Surficial geologic map of the greater Omaha area, Nebraska and …

  8. Nebraska Geology - University of Nebraska–Lincoln

  9. Geologic Maps and Charts | Maps & More | Nebraska Maps

  10. Nebraska Bedrock Geology