What causes the oceans to be salty?

Satellite view of La Plata River discharge to the Atlantic Ocean. One way minerals and salts are deposited into the oceans is from outflow from rivers, which drain the landscape, thus causing the oceans to be salty. read more

Salt in the ocean comes from rocks on land. The rain that falls on the land contains some dissolved carbon dioxide from the surrounding air. This causes the rainwater to be slightly acidic due to carbonic acid (which forms from carbon dioxide and water). As the rain erodes the rock, acids in the rainwater break down the rock. read more

Causes of salinity in oceans. Permalink Submitted by Nellvilah (not verified) on Thu, 03/05/2018 - 22:02 volcanic activities in the ocean brings on the sea water floor of minerals and gares from thf interior of earth's crust e.g during the formation of oceanic ridges and trenches. read more