Columbia subject headings:
Paleoclimatology--Quaternary.
Paleogeography--Quaternary.
Harvard subject headings:
Geology, Stratigraphic--Quaternary
Glacial epoch.
Paleoclimatology--Quaternary
Princeton subject headings:
Geology, Stratigraphic--Quaternary.
Glacial epoch.
Paleoclimatology--Quaternary.