This fantastic occurrence of zeolites became known as "Das Antas", "Das Antas Tunnel" or "Rio das Antas", although the name is misleading. For explanation of this mistake, see the article "The Amazing zeolites occurrence known as "Das Antas" in the link below (in portuguese).
References
Lieber, Werner (1978) Lapis: 3(1).
External Links
http://www.museumin.ufrgs.br/porsite.htm (Portuguese)
http://www.museumin.ufrgs.br/ingAntas.htm (English version)
Mineral List
10 entries listed. 7 valid minerals. 1 erroneous literature entry.
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