National Geologic Map Database
General Information
- Title: Hydrogeology of the Cambrian-Ordovician aquifer system in the northern midwest, United States, with a section on ground-water quality
- Author(s): Young, H.L., and Siegel, D.I.
- Publishing Organization: U.S. Geological Survey
- Series and Number: Professional Paper 1405-B
- Larger Work: Regional aquifer-system analysis - Northern Midwest
- Publication Date: 1992
- Map Scale: 1:2,500,000
- Cross Section: Yes
- North Latitude: 46° 13' 30" N (46.2250)
- South Latitude: 37° 23' 36" N (37.3933)
- East Longitude: 84° 11' 37" W (-84.1936)
- West Longitude: 96° 48' 23" W (-96.8064)
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