Biografia del black hole
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Publicado: 27 de junio de 2011
Blue hole
The Great Blue Hole, located near Ambergris Caye, Belize
A blue hole is a cave (inland) or underwater sinkhole. They are also calledvertical caves. There are many different blue holes located around the world, typically in low-lying coastal regions. The best known examples can be foundin Belize, the Bahamas, Guam, Australia (in the Great Barrier Reef), and Egypt (in the Red Sea).
Blue holes are roughly circular, steep-walleddepressions, and so named for the dramatic contrast between the dark blue, deep waters of their depths and the lighter blue of the shallows around them.Their water circulation is poor, and they are commonly anoxic below a certain depth; this environment is unfavorable for most sea life, but nonetheless cansupport large numbers of bacteria. The deep blue color is caused by the high transparency of water and bright white carbonate sand. Blue light is themost enduring part of the spectrum; where other parts of the spectrum—red, yellow, and finally green—are absorbed during their path through water, bluelight manages to reach the white sand and return back upon reflection.[1]
The deepest blue hole in the world—at 202 metres (663 ft)—is Dean's BlueHole, located in a bay west of Clarence Town on Long Island, Bahamas. Other blue holes are about half that depth at around 100–120 metres (330–390 ft). Thediameter of the top entrance ranges typically from 25–35 metres (82–115 ft) (Dean's Blue Hole) to 300 metres (980 ft) (Great Blue Hole in Belize).
The Great Blue Hole, located near Ambergris Caye, Belize
A blue hole is a cave (inland) or underwater sinkhole. They are also calledvertical caves. There are many different blue holes located around the world, typically in low-lying coastal regions. The best known examples can be foundin Belize, the Bahamas, Guam, Australia (in the Great Barrier Reef), and Egypt (in the Red Sea).
Blue holes are roughly circular, steep-walleddepressions, and so named for the dramatic contrast between the dark blue, deep waters of their depths and the lighter blue of the shallows around them.Their water circulation is poor, and they are commonly anoxic below a certain depth; this environment is unfavorable for most sea life, but nonetheless cansupport large numbers of bacteria. The deep blue color is caused by the high transparency of water and bright white carbonate sand. Blue light is themost enduring part of the spectrum; where other parts of the spectrum—red, yellow, and finally green—are absorbed during their path through water, bluelight manages to reach the white sand and return back upon reflection.[1]
The deepest blue hole in the world—at 202 metres (663 ft)—is Dean's BlueHole, located in a bay west of Clarence Town on Long Island, Bahamas. Other blue holes are about half that depth at around 100–120 metres (330–390 ft). Thediameter of the top entrance ranges typically from 25–35 metres (82–115 ft) (Dean's Blue Hole) to 300 metres (980 ft) (Great Blue Hole in Belize).
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