Question

explain the evolution of oceans​

Answer 1

Answer:

The ocean formed billions of years ago.

Most scientists agree that the atmosphere and the ocean accumulated gradually over millions and millions of years with the continual 'degassing' of the Earth's interior. ... As the water drained into the great hollows in the Earth's surface, the primeval ocean came into existence.

Answer 2

Answer:

About 60 million years ago a new rift and oceanic ridge formed between Greenland and Europe, separating them and initiating the formation of oceanic crust in the Norwegian Sea and the Eurasian basin in the eastern Arctic Ocean. ... Less than 30 million years ago, seafloor spreading ceased in the Labrador Sea.