Columbia subject headings:
Geology, Stratigraphic--Mesozoic.
Geology, Stratigraphic--Tertiary.
Geology--Africa, Southern.
Harvard subject headings:
Geology, Stratigraphic--Mesozoic
Geology, Stratigraphic--Tertiary
Geology--Africa, Southern.
Princeton subject headings:
Geology, Stratigraphic--Mesozoic.
Geology, Stratigraphic--Tertiary.
Geology--Africa, Southern.