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1.

Bedrock Geology [Illinois] (2005) Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

2005. Illinois State Geological Survey. Distribution and extent of the bedrock geologic units within Illinois. Data are as depicted on the map Bedrock Geology of Illinois (2005) by D. Kol... Illinois State Geological Survey.

2.

Bedrock Geology - Geologic Units [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1967. Illinois State Geological Survey. Distribution and extent of the bedrock geologic units within Illinois. Data originally from the Geologic Map of Illinois (1967) by Willman and et. ... Illinois State Geological Survey.

3.

Major Bedrock Valleys [Illinois] University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1994. Illinois State Geological Survey. Continuous lines representing the lowermost elevations/ locations of (buried) bedrock valleys in the state of Illinois. Names of buried valleys are... Illinois State Geological Survey.

4.

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.

5.

Physiographic Divisions [Illinois] University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1993. Illinois State Geological Survey. The Physiographic divisions of Illinois, including Provinces, Sections, and Divisions. Data are originally from ISGS Report of Investigations 129 b... Illinois State Geological Survey.

6.

Quaternary Deposits [Illinois] (1979) University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1979. Illinois State Geological Survey. Quaternary Deposits in Illinois that lie at or near the land surface, including loess deposits. Data originally from Quaternary Deposits of Illinoi... Illinois State Geological Survey.

7.

Buried Bedrock Surface [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1994. Herzog, B.L., B.J. Stiff, C.A. Chenoweth, K.L. Warner, J.B. Sievering, and C. Avery. Topography of the bedrock surface in Illinois. Bedrock topography is shown as 50-foot (15-meter) contours of bedrock elevation above mean sea level... Illinois State Geological Survey.

8.

Glacial Boundaries [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1998. Illinois State Geological Survey. Glacial boundary lines representing the extent of glaciation for major glacial episodes in Illinois. Data originally from Quaternary Deposits in Il... Illinois State Geological Survey.

9.

Glacial Drift: Thickness and Character [Illinois] University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1994. Illinois State Geological Survey. Unconsolidated deposits, mainly glacial drift, overlie the bedrock surface in most of Illinois. Data are originally from ISGS Circular 490 by Piski... Illinois State Geological Survey.

10.

Land Survey Field Notes [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

Illinois State Geological Survey. The Illinois State Geological Survey's typed field notes in the map library have been scanned as part of the National Geological and Geophysical Da... Illinois State Geological Survey.