Columbia subject headings:
Geology, Stratigraphic--Pleistocene.
Geology--Indiana.
Geology--Michigan.
Glacial epoch.
Great Lakes (North America)
Harvard subject headings:
Geology, Stratigraphic--Pleistocene
Geology--Indiana
Geology--Michigan
Glacial epoch.
Great Lakes (North America)
Princeton subject headings:
Geology, Stratigraphic--Pleistocene.
Geology--Indiana.
Geology--Michigan.
Glacial epoch.
Great Lakes (North America)