In coastal areas, the sea is shallow. Ocean currents and waves have eroded the coastline for a long time, and the washed sand is in a certain area far from the coast.

Accumulate to form sandbars; Or rivers carry sediment into the sea, and form sandbars somewhere far from the estuary, gradually isolating some sea areas close to the mainland and forming salt lakes.

How did the continental salt lakes form?

There are two forces that form continental salt lakes: internal force and external force.

The force caused by the internal movement of the earth, especially the crustal movement, is called internal force; The force formed by the earth's surface environment is called external force.

Because the internal force of the earth pushes the crustal movement, it will bend and break when it is squeezed.

The curved part of the stratum or the depressed part of the fault becomes the center of the lake basin, while the protruding part or the uplift part becomes the edge of the lake basin, so the lake basin formed in this way is called "structural lake basin" in geology; In addition, the formation of lake basin is similar to volcanic activity.

Moving related.

A lake basin formed by external forces of the earth (such as flowing water erosion and accumulation, sand erosion and accumulation, glacier erosion and accumulation, etc.). ) is called erosion lake basin in geology.

Chaerhan has formed a legend: Chaerhan has a legend that says: A long time ago, Chaerhan was full of gold, silver and jewels, but the mountain gods and demons were irresponsible and indifferent, fighting for the treasure all the year round, which brought great disasters here. The Queen Mother of the West, who lives in the depths of Kunlun Mountain, said, "This is outrageous" and decided to settle these matters. She ordered the water god to put down Tianshui and drown all these treasures, so that no one could get them, leaving only the descendants of the world. As a result, such a salt lake appeared here. In fact, Chaerhan Salt Lake was formed when the ancient ocean was separated by peaks and gradually shrank and dried up through crustal changes in the Qinghai-Tibet Plateau.