Columbia subject headings:
Harvard subject headings:
Geology, Stratigraphic--Cenozoic--Maps.
Geology, Stratigraphic--Mesozoic--Maps.
Sedimentary structures--England--Maps.
Sedimentary structures--Wales--Maps.
Settling basins--England--Maps.
Settling basins--Wales--Maps.
Princeton subject headings:
Geology, Stratigraphic--Mesozoic--Maps.
Geology, Stratigraphic--Permian--Maps.
Geology--England--Maps.
Geology--Wales--Maps.
Sedimentary structures--England--Maps.
Sedimentary structures--Wales--Maps.