Columbia subject headings:
Geology, Stratigraphic--Mesozoic.
Geology--China.
Iron ores--China.
Volcanic ash, tuff, etc.--China.
Volcanism--China.
Harvard subject headings:
Princeton subject headings:
Geology, Stratigraphic--Mesozoic.
Geology--China.
Iron ores--China.
Volcanic ash, tuff, etc.--China.
Volcanism--China.