Hidden Falls member named the middle member (of 5) of Platteville formation in St. Paul area, Ramsey County, Minnesota, on the Sioux uplift. Hidden Falls overlies Mifflin member of Platteville and underlies Magnolia member of Platteville. Age not stated.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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