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Mar 3. Mar 2. Mar 1. Feb The Bahamas. It reaches feet in a bay on the western side of Clarence town on Long Island. A blue hole is a sinkhole that the ocean fills with water. The entrance to it is beneath the surface of the water. The exterior shape of it is circular. Its diameter ranges from meters. After descending 66 feet under the surface, the hole widens notably into a cave with a diameter of meters.
On calm days, you can see from around feet. William Trubridge, the professional diver, broke a free-diving world record in the blue hole in April by reaching a depth of 92 meters without using fins. Formation: There are still many discussions about its formation. When to get there? You can go there any time of the year. Several water-filled sinkholes though are deeper. There is some huddle regarding the terms "sinkhole" and "blue hole".
Some say that blue holes are not exactly sinkholes but rather vertical caves. The fact is that sinkholes ARE a kind of vertical caves — sinkholes are holes or natural depressions caused by karst processes. It seems that the decisive factor in the use of this term is the beautiful deep blue color of water in these formations. This color is created by the high transparency of water and bright white carbonate sand.
Blue light is the most enduring part of the spectrum: where other parts of the spectrum — red, yellow, and finally the green — are absorbed during their path through the water, blue light manages to reach the white sand and return back after the refraction.
Bahamas were the first where this term has been applied to diverse beautiful sinkholes filled with seawater. Blue holes here as elsewhere in the world formed in times when the sea level was lower than now. Sometimes these holes were formed by deeper groundwater gradually dissolving the limestone until the ceiling of these voids collapsed. Sometimes though they were formed by the rainwater seeping into limestone through a crevice and gradually making it wider.
Here, in this beautiful geological formation is meeting the might and beauty of nature and hardiness of people. Over the last decade this blue hole in Bahamas though has become a scene of world-class free-diving.
Since here is established a freediving school "Vertical Blue" operates from November to May , which organizes also yearly world competition in April. This deep sinkhole is perfect for such sports — it is located right next to the bank, in calm water.
Cave has seen many incredible world records in diverse disciplines of free-diving by the best freedivers of the world, including Natalia Molchanova, Herbert Nitsch, William Trubridge.
One such discipline, for example, is — Constant Weight Apnea Without Fins diving possibly deep and returning in one breath without any appliances and without holding at the rope. How deep one can go in such a way? On December 13, , William Trubridge dived meters deep and then meters back in such a way, it took 4 minutes 10 seconds. Try at least to run meters forth and meters back without breathing — even that is a serious challenge!
An interested visitor of the Bahamas will be rewarded with many unique monuments of nature and also several exciting cultural attractions. Islands are rich with legends including stories about unusual creatures looming in the wild forest and swamps. This category includes outstanding sinkholes — large natural depressions or holes, which for most the part represent collapsed caves.
The Dive Atlas of the World offers an inspirational tour of top dive sites around the world, based on first-hand experience, and photographed by experts. The twelve stories that comprise the Kantaberry Tales are about the people and events that have helped to identify this part of the Bahamas known as North Eleuthera as the most unique and diverse place within the country. Search for:.
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