Additional Funding for Geology of Lake County Project

Examples of 3-dimensional maps from Lake County.The Illinois State Geological Survey has been conducting detailed geologic mapping throughout Lake County in northeastern Illinois for the past several years. The work has been funded by the State of Illinois and the U.S. Geological Survey through the Central Great Lakes Geologic Mapping Coalition and the STATEMAP component of the National Cooperative Geologic Mapping Program. More recently, Lake County government has provided additional funding to help expedite the project's completion. The effort has focused on the collection of high-quality data from outcrops, drilling, and geophysics with the integration of state-of-the-art computerized mapping software and methods to create detailed three-dimensional (3-D) geologic maps of the glacial and related deposits and the bedrock surface. Products will include a single, high-resolution, 3-D geologic map and a variety of other geologic maps that can be used for decision making. Additionally, a suite of digital image files and animations will be developed from the 3-D geologic map for educational use.

The glacial geology of Lake County records fluctuations of glacial margins during the last part of the Ice Age and represents one of the most geologically complex areas of the state. The glacial deposits are a source of drinking water and construction aggregate. The glacial landscape of the area also includes numerous lakes and the Fox River waterway, which provide recreational opportunities for residents and tourists. The 3-D geologic maps and other products will provide information for planning and for use of these natural resources.