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You searched for: geology Remove constraint geology Creator Illinois State Geological Survey Remove constraint Creator: Illinois State Geological Survey Subject Geoscientific Information Remove constraint Subject: Geoscientific Information Type Dataset Remove constraint Type: Dataset Time Period 1950-1999 Remove constraint Time Period: 1950-1999
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Bedrock Geology of Illinois - Geologic Units, 2004 illinois

1996. Illinois State Geological Survey. This feature class shows the distribution and extent of the bedrock geologic units within the State of Illinois, as depicted on the Geologic Map of...