Distribution and extent of bedrock geologic units within Illinois.  Data are as depicted on the map Bedrock Geology of Illinois (2005) by D. Kolata (compiler).  ISGS, 2007.
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{'Title': 'Bedrock Geology', 'Author': '', 'Comments': 'Distribution and extent of bedrock geologic units within Illinois.  Data are as depicted on the map Bedrock Geology of Illinois (2005) by D. Kolata (compiler).  ISGS, 2007.', 'Subject': 'Distribution and extent of bedrock geologic units within Illinois.', 'Category': '', 'AntialiasingMode': 'None', 'TextAntialiasingMode': 'Force', 'Keywords': 'bedrock,geology,ISGS,Illinois'}
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nan