Which mechanism primarily reduces lake water salinity in closed-basin lake systems over geological timescales?

💡 Explanation

When sediment containing clay deposit in a lake, ion adsorption occurs because clay minerals attract and bind positively charged ions, effectively removing salinity from water. Therefore preferential clay adsorption reduces lake salinity, rather than precipitation, outflow, or photosynthesis which either increase or don't effectively reduce salinity consistently.

• Which outcome results when a lava dome's flank destabilizes?
• Which outcome results when pre-existing rocks undergo differential erosion by wind?
• Which process initiates headwall erosion to form distinct glacial cirques given seasonal freeze-thaw cycles?
• Which morphological outcome arises during the transition when multiple cirques erode a mountain mass?
• Which long-term consequence results when a large river's sediment load significantly decreases upstream from a natural levee?
• Which outcome accelerates atoll island erosion following vegetation loss?