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Cook County


cook county map Map legend and scale


Low elevation: <580 feet above mean sea level
      Place: Lake Michigan shoreline
      7.5' quadrangle name: Chicago Loop (and others)
      PLSS: 3-28-40N-14E
      Geology: Ravinia Formation, beach deposits

High elevation: >950 feet above mean sea level
      Place: Unnamed hilltop
      7.5' quadrangle name: Streamwood
      PLSS: 3-18-42N-9E
      Geology: West Chicago Moraine

Area: 949.20 square miles
      Total relief (approximate): 370 feet
      Average percent slope: 0.64%


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ILLINOIS STATE GEOLOGICAL SURVEY
INSTITUTE OF NATURAL RESOURCE SUSTAINABILITY     |    UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN

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Updated 5/4/2007 JKH