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Subject
- Geology96
- Mines and mineral resources30
- Groundwater24
- Sediments (Geology)15
- Geochemical prospecting12
- Geomagnetism12
- Aquifers11
- Geology, Stratigraphic10
- Geology, Structural9
- Gravity anomalies9
- Coal8
- Magnetic anomalies5
- Water quality4
- Formations (Geology)3
- Heavy minerals3
- Hydrology3
- Regional planning districts3
- Uranium ores3
- Water table3
- Water use3
