Big Ten Academic Alliance Geospatial Discovery Portal
Big Ten Academic Alliance Geoportal
Ancient shorelines of southwestern Lake Michigan
- Thompson, Todd A.(Todd Alan), 1959-cartographer.
- Includes ill., text, graphs showing Lake-level fluctuations over the past 4,700 years and a timeline showing historical events since 1166 B.C. tied to specific beach ridges.; Poster 2.1.; The map below was created by tracing beach ridges from a series of aerial photographs of northern Lake and Porter Counties taken in 1938. Scale approximately 1:59,000.
- Indiana University, Indiana Geological Survey
- Indiana Historic Maps
- Porter County, Indiana, United States, Lake County, Indiana, United States, Lake Michigan, United States, and Indiana, United States
- Thematic maps
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