![Geology of the Chicago Lakeshore: Chicago's Underwater Landscape Geology of the Chicago Lakeshore: Chicago's Underwater Landscape](/files/images/09-ISGS-Chicagos-Underwater-Landscape. Courtesy Illinois State Geological Survey.preview.jpg)
Courtesy Illinois State Geological Survey. Poster available for purchase, contact Le Ann Benner at benner@isgs.illinois.edu
![]() ![]() Courtesy Illinois State Geological Survey. Poster available for purchase, contact Le Ann Benner at benner@isgs.illinois.edu |