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You searched for: Resource Class Imagery Remove constraint Resource Class: Imagery Resource Type Polygon data Remove constraint Resource Type: Polygon data Time Period 1950-1999 Remove constraint Time Period: 1950-1999

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1.

Driftless Areas [Illinois] university-of-illinois-urbana-champaign

1994. Illinois State Geological Survey. Driftless areas in Illinois. These areas are analogous to areas of the state where the bedrock surface is not buried by glacial drift. Data origina... Illinois State Geological Survey.

2.

Woodfordian Moraines [Illinois] university-of-illinois-urbana-champaign

1991. Illinois State Geological Survey. Named Woodfordian moraines, or Wisconsinan End Moraines, of Illinois. Data originally from ISGS Bulletin 94, Pleistocene Stratigraphy of Illinois, ... Illinois State Geological Survey.