The Great Blue Hole in Belize is an extraordinary marine sinkhole renowned for its unique structure and diverse marine life.
This natural wonder features a layer of freshwater at the top, while denser saltwater settles at the bottom, creating two distinct environments due to their density differences. The separation of these layers supports various types of marine life, contributing to the hole’s unique ecological characteristics.
Circular in shape, the Great Blue Hole measures 318 meters in width and 124 meters in depth. It formed during several periods of the Quaternary glaciation when sea levels were significantly lower. Cave formations within the hole indicate their formation occurred 153,000; 66,000; 60,000; and 15,000 years ago.
As sea levels rose again, the cave became submerged. This remarkable site is part of the Belize Barrier Reef and is recognized as a UNESCO World Heritage site.
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