Why Is The Ocean Salty?

By jamie

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4. 500-Feet Thick

With only around 3.5% of salt in the ocean, it doesn’t sound as though it would amount to much overall. There is, however, a vast amount of water in the oceans. So vast that the 3.5% that is salt adds up to a volume of salt that might surprise you.

If it were possible to extract all of the salt in the oceans and spread it evenly over the surface of our planet, we would end up with a layer of salt that is 500-feet thick. That is approximately the same height as a 40-story building over the entirety of Earths surface.

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