Rain dissolves minerals from rock and carries them to rivers, which transport these minerals to the ocean; as water evaporates, salt remains behind, and this process has been occurring for 4 billion years, resulting in the ocean containing approximately 50 million billion tons of salt, which would form a layer 500 feet thick if spread on land, with hydrothermal vents adding additional minerals and causing the ocean to become saltier each year.
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The Ocean Has Enough Salt to Bury All Land 500 Feet DeepAdded:
Rain dissolves minerals from rock and carries them to rivers. Rivers carry those minerals to the ocean. Water evaporates. Salt stays behind. This has been happening for 4 billion years. The ocean now holds about 50 million billion tons of salt. If you spread it on land, it would form a layer 500 ft thick.
Hydrothermal vents on the ocean floor add even more minerals. The ocean gets saltier every year. Full breakdown on our channel.
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