Illinois State Geological Survey geologist analyzes a glacial deposit outcrop

By National Cooperative Geologic Mapping Program 2020 (approx.)

A geologist stands at an outcrop containing a small boulder deposited by a glacier with a video camera in the foreground.

Detailed Description

Illinois State Geological Survey (ISGS) geologists and the State of Illinois are featured in the History Channel's internationally popular program, How the Earth Was Made: America's Ice Age. The geologists lead the search across Illinois for evidence of glaciation which played a defining role in the geography and consequently the economy of Illinois and the U.S.

Sources/Usage

Public Domain.

Photo by Illinois State Geological Survey.