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- Sediments (Geology)1
- Seismology1
- Seminole Indians1
- Shipwrecks1
- Sinkholes1
- Soil permeability1
- Soils1
- Southern States1
- Steamboat lines1
- Stream-gaging stations1
- Swamps1
- Temperature1
- Tidal currents1
- Treasure troves1
- Valdosta1
- Water levels1
- Water-supply, Rural1
- Watersheds1
- West Indies Expedition, 1585-15861
- Wetland ecology1