Why doesn salt build up and deposit on the ocean shores?
Because as it laps up, it also pulls back. Now yes, it does deposit some small fraction of salt each time, but compared to the normal movement of water, it is completely insignificant. This is further compounded by the fact that all of the sand grains within reach of the water are constantly in motion, being pushed up, or pulled back, usually both, as with longshore drift. Finally, salt it quite happy do be in solution. It doesn’t just precipitate out. Salt ends up on your skin when you go to the beach because you’ll go into the ocean for a swim, then go back and sit on the blanket. The water evaporates away, leaving a dusting of salt. But in the area of constant moisture and constant motion, there is no possibility of salt crystallizing out of solution. Up in the Bay Area they make tons and tons of sea salt out of ocean water. But what do they do? They open up gates to flat fields the size of football stadiums, then close it up and let it sit there. Over weeks or months, this water wi
