Melt-water channel deposits area among the most important aquifers in southwestern Minnesota, but permeable zones with the deposits are difficult to locate. Interpretation of the depositional history of prolacial channel deposits from aerial photpgraphs and test-hole samples indicates the position of the permeable zones. Generally, the coarse-grained deposits are in headwater areas, near the confluence of two channels, in bends, or at the junction of sluiceways. Locally, these deposits yield as much as 1,000 gallons per minute to wells.
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U.S. Geological Survey
Minnesota Water Research Digital Library