The origin and evolution of the ocean is closely related to the origin of the earth. In the past two centuries, human knowledge about the origin and evolution of the ocean has made great progress. Although the problem has not been solved, it is possible to put forward some models of ocean development according to the existing data (mainly geological records) and modern earth history.

It is generally believed that the earth is 4.6 billion years away. ......

The origin and evolution of seawater is in that early stage of the earth's history,

Ocean water was formed in the early stage of earth evolution, and the primitive earth condensed by nebulae continued to accumulate and expand on the one hand.

The primitive ocean is an acidic hot ocean. Acidic hot water in primitive ocean reacts violently with minerals in igneous rocks.

Early seawater

Modern seawater

The origin and evolution of ocean basin is the place where seawater meets, and its formation and development is an important aspect of the origin and evolution of ocean.

The origin of ocean basin

Development stage of marine basin

The typical representative of embryonic period is the East African Rift Valley System.

Evolution history of ocean basins In the history of earth evolution, oceans and continents often change their geographical position, configuration form, size and quantity. Submarine expansion and continental drift, that is, plate splitting and convergence, have existed for at least 700 million years, and they may have a history of more than 2 billion years.

Cambrian 570 million years ago ...

Devonian period about 370 million years ago ...

Late Carboniferous, 300 million years ago. ...

The Permian period about 225 million years ago ...

Early Cretaceous 1.35 to 1. 1 100 million years ago. ...

Late Cretaceous 70 million years ago ...

Paleocene 65 million years ago ...

At the beginning of Eocene 53 million years ago, ..

Miocene about18 million years ago. ..

About 03.5 million years ago in Pliocene. ...