Columbia subject headings:
Geology, Stratigraphic--Mesozoic--West (U.S.)--Congresses.
Geology--West (U.S.)--Congresses.
Paleogeography--West (U.S.)--Congresses.
Harvard subject headings:
Geology, Stratigraphic--Mesozoic--Congresses.
Paleogeography--West (U.S.)--Congresses.
Princeton subject headings: