38435
Hill, John R., Sturgeon, Polly R., Thompson, Todd Alan
2017
SPG08-2017
Indiana Geological and Water Survey, 2017, Geologic story of Indiana Dunes State Park: Indiana Geological and Water Survey State Park Guide 08-2017.
2017 update to Indiana Geological & Water Survey State Park Guide 08: Indiana Dunes State Park
Marker lat / long: 41.649352, -87.069228 (WGS84)