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Subject
- Geology661
- Groundwater63
- Aquifers40
- Geology, Structural36
- Geology, Stratigraphic28
- Hydrogeology28
- Water table18
- Mines and mineral resources15
- Roads11
- Groundwater flow9
- Geochemical prospecting8
- Geomorphology8
- Coal7
- Harbors6
- Ocean bottom6
- Faults (Geology)5
- Geological cross sections5
- Gold ores5
- Hydrography5
- Volcanic eruptions5