Why is salt formed only in oceans and not in lakes and rivers though both are water bodies?

Question

And though they are from a very long time???

Answer 1

Salt doesn't "form" in the ocean perhaps as you might be thinking. The mineral halite precipitates from isolated bodies of water that once were a part of the ocean. The Great Salt Lake was once part of a vast inland sea. Measurable amounts of Na and Cl  and other ingredients of lesser known salts can be found in most water bodies due to the dissolution of rock salt found naturally occurring in the bedrock on which the lakes, streams and rivers rest upon.

The reason why the ocean is so much saltier is simply due to its volume. The ocean sits atop a huge area of rock (oceanic crust) that is made up of, in part, the elements Sodium (Na) and Chlorine (Cl), the ingredients in halite. Remember table salt is made of the mineral halite, a rock made up of halite is called rock salt. So anywho, as lakes drain into streams and streams spill into rivers and rivers find their way to the ocean, they slowly dissolve Na and Cl and carry these ions into the ocean contributing to the oceans saltiness.

I could go on all day but I think you see what I'm saying.

Answer 2

Because most rivers and lakes disappear or the landscape reshaped. As the ocean stays the same. Besides when the water evaporates from the ocean to form the rivers and the lakes as rain, The salt stays in the ocean and just water forms those water bodies. I think....

Answer 3

because ocean has sodium and chloride NaCl and the river or lakes don't have.

Answer 4

Salt Lake Utah.

Answer 5

Salt is not "formed" in oceans, and neither is it formed in lakes.

Trace amounts of salt are dissolved from rocks, minerals, and soil by lakes and rivers, and flow to the oceans. The oceans don't have outlets, they can only evaporate.  One of the principles of evaporation is that only pure water gets evaporated, and that means impurities including the salt get left behind, concentrating in the oceans over millions of years.

Lakes have outlets, so rainwater keeps them fresh.  However, in conditions of negative water balance such as the Great Basin in the US (eg Great Salt Lake)  and the East Africa Rift in Tanzania (eg Lake Manyara), the lakes are salty because of the concentration due to evaporation.