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Bohling, Geoffrey C. / A ground penetrating radar study of water table elevation in a portion of Wisconsin's central sand plain
[DNR-050] (1988)

II. Geology and hydrogeology of the study area,   pp. 10-18 PDF (1.9 MB)


Page 12

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sandstone is about 1000 feet above sea level. An earlier map of bedrock
(Weeks and Stangland, 1971; modified by Faustini, 1985) also shows sand-
stone occurring north of Highway 54 in the study area.
C. Glacial Outwash Sand
The glacial outwash sand in the area is composed primarily of sedi-
ments that were deposited in glacial Lake Wisconsin during the Almond
and Hancock phases of Wisconsin Glaciation (Clayton, 1986). Associated
stream sediments may occur in the northeastern corner of the study area.
The sediments in the area correspond to lithologic units 3 and 4 described
by Brownell (1986). Brownell reports that these units are composed
predominantly of moderately-well-sorted and moderately-sorted medium
sand. Figures 3, 4 and 5 show grain size distributions for the sand frac-
tions of samples taken at different depths in borings 103, 107 and 109 in
the study area (Figure 2). The data are from Kraft (in preparation). The
samples are composed primarily of medium sand with some coarse sand
and are predominantly moderately-well-sorted, except for the samples from
boring 109, which are predominantly well-sorted. There appear to be no
consistent trends with depth.
The land surface is fairly level in the area, ranging in elevation
from about 1060 to about 1070 feet above sea level. The saturated thick-
ness of the aquifer is controlled by the elevation of the water table and the


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