Access to the full image is restricted.
- 35mm slide: 3708
- World Region
- North America
- Great Lakes Region
- United States
- Maximum extent of four principle glacial stages.
- Image Categories
- Map: Geographic/natural features
- Source Type Detail
- Book Citation: "Geology of the Great Lakes," by Jack Luin Hough; Fig. 30, p. 92. Urbana, IL: University of Illinois Press, 1958.
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