What is a blue hole? How and where do they form? When I first saw the picture of the Great Blue Hole in Belize I wondered the same thing.
A blue hole is classified as a sinkhole or cave in a body of water. Most blue holes are circular with steep walls that give the water a distinct dark look compared to the surrounding water. Since the holes are so deep and the circulation is poor it’s almost impossible for typical sea animals to live in these blue holes; however, they are typically infested with bacteria.
Looking through the pictures of blue holes around the world I am astounded at the creations that have been made on Earth over the past thousands of years. Most of these blue holes are over 300 feet deep and are found in the middle of very shallow water. This is exactly what I think about when I think of earth art. All of these phenomenon’s are examples of how the earth has used it’s own resources to create an amazing image.
It’s believed that blue holes were formed during the ice ages because the sea level was so much lower. During these times “chemical weathering” formed large holes that were submerged once the ice melted.
(http://en.wikipedia.org/wiki/Blue_hole)
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2 comments:
Wow that's pretty amazing. I saw something similar to this in Las Estacas, Mexico (you should look it up) and it looked a lot like these but it was a spring that came from under the mountains that was dumping an enormous amount (can't remember the number) of water per second. We tried to snorkel down in there, but the pressure was too strong!
I searched on google for springs and whatnot around Las Estacas and I found some pretty cool pictures. I love pictures taken in the caribbean and similar areas!
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