If water flowing over continents in rivers is what concentrates salt in our ocean, would a planet that has always been covered in water just be freshwater? The water is just sitting there, not eroding through salts.
If water flowing over continents in rivers is what concentrates salt in our ocean, would a planet that has always been covered in water just be freshwater? The water is just sitting there, not eroding through salts.
The rivers bring salt to the lakes and ocean that they erode when passing. Those get saltier over time. Evaporation filters that out and feeds the fresh water to everything again, but the salt gets deposited in the more permanent structures.