Classification					revised on 7 March 2013
	Dept. Geology & Mineralogy
0	General Books		13	Physics
1	General Geology		14	Mathematics
1-S	Structural Geology		14-G	Mathematical Geology
1-T	Tectonophysics
1-V	Volcanology		15	Chemistry
2	Sedimentology &　Stratigraphy		16	Europe
	（Historical Geology)
3	Economic Geology		17	North America,Greenland
4	Geophysics		18	South America
4-R	Rock Mechanics
			19	Africa
5	Petrology
5-I	Igneous Petrology		20	Oceania,South Sea Islands
5-M	Metamorphic Petrology
5-S	Sedimentary Petrology		21	Antarctica(Polar Region)
6	Paleontology		22	Former Soviet Union(CCCP)
6-G	General Paleontology
6-M	Micropaleontology		23	China,Mongollia,Korea
6-I	Invertebrate Paleontology
6-V	Vertebrate Paleontology		24	Southeast Asia,West Asia
6-A	Anthropology
6-P	Plant Paleontology		25	Japan
6-B	Biology
			26	Ocean Basins & Islands
7	Geochemistry(Mineral Deposits)		26-P	Pacific Ocean Basin
			26-I	Indian Ocean Basin
8	Mineralogy		26-A	Atlantic Ocean Basin
			26-Ar	Arctic Ocean Basin
9	Crystallography		26-Is	Oceanic Islands
10	Geography		27	Planetology
			27-G	Planetary Geology
11	Climatology
11-P	Paleoclimatology		28	Remote Sensing
12	Oceanography		29	Environmental Sciences
12-P	Paleoceanography
12-D	Ocean floor Drilling