Columbia subject headings:
Geology, Stratigraphic--Quaternary.
Soil formation.
Soil science.
Weathering.
Harvard subject headings:
Geology, Stratigraphic--Quaternary
Soil formation.
Soil science.
Weathering.
Princeton subject headings:
Geology, Stratigraphic--Quaternary.
Soil formation.
Soil science.
Weathering.