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You searched for: geology Remove constraint geology Author Illinois State Geological Survey Remove constraint Author: Illinois State Geological Survey Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Year 1995 Remove constraint Year: 1995
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1.
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Stack-Unit Mapping of Geologic Materials to a Depth of 15 Meters: Illinois, 2004

1995. Illinois State Geological Survey. This is an SDE polygon feature class containing stack-unit map designations for Illinois. The primary source is ISGS Circular 542, Stack-unit Mappi...

2.
Structural Features - Faults: Illinois, 1995

Structural Features - Faults: Illinois, 1995

1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant faults, fa...

3.
Structural Features: Illinois, 1995

Structural Features: Illinois, 1995

1995. Illinois State Geological Survey. This feature dataset is a representation of Plate 1 from ISGS Bulletin 100 (1993) by W. John Nelson. Features depicted are limited to well document...

4.
Structural Features- Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines: Illinois, 1995

Structural Features- Line Features (Axial or Flexure) of Anticlines, Synclines and Monoclines: Illinois, 1995

1995. Illinois State Geological Survey. This is a partial representation of Plate 1 from ISGS Bulletin 100 (1993). Features depicted are limited to well documented, significant anticlines...