How did the blue hole in Belize form?

The Blue Cave in Belize is a famous scenic spot. Its hole is round and surrounded by two beautiful coral reefs. I lay quietly in the sea. Because the hole is deep and the water in the hole looks blue from the outside, it is called blue hole. If you look at it from high altitude, it is like the sea with a deep blue eye, mysterious and strange.

In fact, several such blue holes are known, as well as in our country. Belize is not the only blue hole in the world.

Yongle Longdong has such a blue cave in Sansha City, China, which is the deepest one found in the world at present, with a depth of 300 meters. It is near Yongle Atoll in Xisha Islands.

There is also a blue hole in the blue hole in Capri Island, Italy, which is one of the seven wonders of the world. The cave is so mysterious that even the stones in it are blue. There is a small hole under the cliff. Because of its special structure, sunlight can enter the cave and then reflect back from the bottom of the water, reflecting the seawater in Tongli into crystal blue. But the hole is a little small, and only boats can get in.

There is also a blue cave in Saipan, which is a cave formed by the collapse of limestone after long-term seawater corrosion. The cave is connected with the sea water outside through three channels, and light enters the cave from the channels, making the water in the cave blue.

But the blue hole in Belize is probably the most famous in the world. Many diving enthusiasts often go there to dive and become a diving sanctuary. How did this blue hole with a depth of over120m and a diameter of 300m form? In fact, scientists have long analyzed the reasons for its formation, not mysterious reasons. The Bahamas, where the Peliz Blue Cave is located, belongs to limestone texture and was formed more than1.300 million years ago. In the following millions of years, because it happened to be in the ice age, the cold weather froze the water in the glacier, which caused the sea level to drop, and because of the double corrosion of seawater and fresh water, many large and small caves gradually formed in limestone areas. The original site of the Blue Cave in Belize is also a large limestone cave. Because of its low geological density and loose texture, under the action of earthquakes and other factors, the roof of the cave collapses downward, forming an upright well-shaped stone cave with a circular entrance. Times have changed, the climate has become warmer, the ice and snow have melted, the sea level has risen, and the hole has been flooded, forming this scene today.

Nowadays, it has become a famous diving place, but there are many stalactites and sharks in the cave, which is not for ordinary divers to dare to play. At 197 1, it was rated as one of the top ten diving places. Later, UNESCO listed Belize Blue Cave in the World Heritage List.