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You searched for: Publisher Illinois State Geological Survey Remove constraint Publisher: Illinois State Geological Survey Publisher University of Illinois Urbana-Champaign Remove constraint Publisher: University of Illinois Urbana-Champaign Subject Imagery and Base Maps Remove constraint Subject: Imagery and Base Maps
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2.

Glacial Drift: Thickness and Character: Illinois, 2004 university-of-illinois-urbana-champaign

1994. Illinois State Geological Survey. This is an SDE feature dataset showing drift thickness in Illinois. Data are originally from ISGS Circular 490 by Piskin and Bergstrom (1975), Plat...