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- Geology[remove]475
- Geology, Stratigraphic58
- Paleontology58
- Mines and mineral resources53
- Mineralogy32
- Petrology29
- Geology, Structural16
- Bauxite12
- Volcanic ash, tuff, etc8
- Hydrology7
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- Physical geography7
- Biology6
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- Borings4
- Dissertations, Academic4
- Geophysics4