USGS

Water Quality in the Western Lake Michigan Drainages, Wisconsin and Michigan, 1992-95

ENVIRONMENTAL SETTING AND HYDROLOGIC CONDITIONS FIGURES

Bedrock Geology Map
The bedrock underlying the study area is composed of igneous, metamorphic and sedimentary (sandstone, carbonate, and shale) rock. Bedrock dips southeast toward Lake Michigan. The oldest rock subcrops in the northwest and the youngest in the southeast.

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Last modified: Thu Jul 2 07:29:19 1998