In the Rolas Island (ilheu das Rolas) you will find a curious geological formation called by locals – The Sand Volcano. It is actually a hole in the ground that expels sand to the air with a loud uuuuuuuuuuuuuh sound.
I am guessing it is a lava tube that ends inside the sea, the waves could then create a sort of vacuum effect that would cause the expelling of the sand … but again I am just guessing with a still European mind set and it could be much more fantastic than that!!!
Tuesday, January 22, 2008
Sand Volcano
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