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Subject
- Mines and mineral resources40
- Geology17
- Roads15
- Geology, Stratigraphic14
- Census districts12
- Marine sediments12
- Geochemical prospecting11
- Atlases10
- Geology, Structural8
- River sediments8
- Continental margins7
- Metropolitan areas7
- Cartography6
- Gravity anomalies6
- Ore deposits6
- Faults (Geology)5
- Gold ores5
- Seismology5
- Submarine topography5
- Earthquakes4