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2.

Elevation of the Base of the Barlow Limestone [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

2008. Illinois State Geological Survey. This datafile shows the general elevation of the base of the Barlow Limestone in Illinois.  These 20- and/or 100-foot isolines were contoured using... Illinois State Geological Survey.

3.

Elevation of the Karnak Limestone [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

2008. Illinois State Geological Survey. This datafile shows the general elevation of the top of the Karnak Limestone in Illinois. These 20- and/or 100-foot isolines were contoured using G... Illinois State Geological Survey.

4.

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.

5.

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.

6.

One-Hundred and Five-Hundred Year Floodzones for Unincorporated Areas [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1996. Illinois State Water Survey and Illinois State Geological Survey. Statewide polygon feature class of 100 and 500 year flood zones for unincorporated areas of Illinois as indicated on Federal Emergency Management A... Illinois State Geological Survey.

7.

Quaternary Deposits [Illinois] (1996) Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1996. Barb Stiff. Updated version of Quaternary Deposits of Illinois. Information contained in this data set is more generalized than the 1979 version. While the 197... Illinois State Geological Survey.

8.

Stack-Unit Mapping of Geologic Materials to a Depth of 15 Meters [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1995. Illinois State Geological Survey. Stack-Unit mapping of geologic materials to a depth of 15 meters. Stack-unit maps show the distribution of earth materials vertically from the surf... Illinois State Geological Survey.

9.

Structural Features - Faults [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1995. Illinois State Geological Survey. Structural features, significant faults, faulted flexures and grabens in Illinois. Names of the features and the associated directions of faulting ... Illinois State Geological Survey.

10.

Structural Features [Illinois] Datasets datasets University Of Illinois Urbana Champaign university-of-illinois-urbana-champaign

1995. Illinois State Geological Survey. Structural features depicted are limited to well documented, significant anticlines and domes (and the Glasford Disturbance), impact features, expl... Illinois State Geological Survey.