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You searched for: Creator Illinois State Geological Survey Remove constraint Creator: Illinois State Geological Survey Time Period 1950-1999 Remove constraint Time Period: 1950-1999

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1.

Bedrock Geology - Geologic Units [Illinois] Datasets datasets 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.

2.

County Boundaries [Illinois] Datasets datasets university-of-illinois-urbana-champaign

1968. Illinois State Geological Survey. Contains Illinois county boundaries in line and polygon formats. The polygon attribute data include county name and number (FIPS) designations. The... Illinois State Geological Survey.

3.

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.

4.

Glacial Boundaries [Illinois] Datasets datasets 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.

5.

Glacial Drift: Thickness and Character [Illinois] 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.

6.

Major Bedrock Valleys [Illinois] 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.

7.

National Wetlands Inventory [Illinois] Datasets datasets university-of-illinois-urbana-champaign

1980. U.S. Fish and Wildlife Service, Illinois Department of Natural Resources, Illinois Natural History Survey, and Illinois State Geological Survey. Wetlands and deepwater habitats in Illinois is of 1987 based on U.S. Fish and Wildlife Service National Wetlands Inventory (NWI) data. IDNR. Illinois State Geological Survey.

8.

One-Hundred and Five-Hundred Year Floodzones for Unincorporated Areas [Illinois] Datasets datasets 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.

9.

Physiographic Divisions [Illinois] 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.

10.

PLSS Indian Treaty Boundary Lines [Illinois] university-of-illinois-urbana-champaign

1968. Illinois State Geological Survey. Indian Treaty boundary lines from the Illinois Public Land Survey System. ISGS, 1984 (revised 2003). Illinois State Geological Survey.