Alabama 1 Arctic 1 Atlantic Ocean 1 Gulf of Mexico 1 Holocene 1 Illinois 1 Lake Martin 1 Ohio River 1 Pacific Decadal Oscillation 1 Pacific North American mode 1 United States 1 anthropogenic effect 1 anthropogenic environmental impacts 1 atmospheric circulation 1 environmental impact 1 flooding 1 floodplain 1 floodplain lakes 1 fluvial dynamics fluvial landform 1 geochemical survey 1 geochemistry 1 land use planning 1 paleoclimate 1 palynology 1 sedimentology 1