Biography
There are at least three bands called Atacama.
1) A chilean folk band based in Sweden called Atacama. They have released a self-titled album "Atacama" in 1970, and "Arriba quemando el sol" in 1971. Their albums are very difficult to find and information on the band itself is limited.
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2) A grindcore duo based in Santa Clara, California.
3) A short lived post-hardcore band from Brusque, Brazil.
Biography text from Last.fm, available under CC BY-SA.