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Could "blue holes" offer clues about the biology of extraterrestrials?
In the Bahamas' submerged inland caverns, or "blue holes," a thin layer of fresh water separates oxygen from salt water. This creates a submerged, oxygen-free environment that could resemble underground water pockets on Mars or the seas of Europa.
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The first question that comes to mind is: does the oxygen-free environment imply that there are no oxygen-bearing molecules present within the blue hole? i.e. --silicates of the cavernous walls?
And if the blue hole is a reducing atmosphere---do the astrobiologists who are studying these environs have any clues to what the chemical cycles might be --do they resemble anything like what is purported to be the early Earth?
Although I do not have much offer in terms of new information---this is a very intriguing post.
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