Thursday, April 30, 2009

Blue Hole in Sea and Oceans

Blue holes are giant and sudden drops in underwater elevation that get
their name from the dark and foreboding blue tone they exhibit when
viewed from above in relationship to surrounding waters. They can be
hundreds of feet deep and while divers are able to explore some of them
they are largely devoid of oxygen that would support sea life due to
poor water circulation - leaving them eerily empty

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