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You searched for: Creator Illinois State Geological Survey Remove constraint Creator: Illinois State Geological Survey Resource Class Imagery Remove constraint Resource Class: Imagery Resource Type Vector data Remove constraint Resource Type: Vector data Time Period 1950-1999 Remove constraint Time Period: 1950-1999

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1.

Driftless Areas [Illinois] University Of Illinois Urbana Champaign 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 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.