Zones of alteration in a metagranite. This image detailes pneumatolytic or metasomatic alteration of the metagranite at Stone Mountain which manifests as sodic plagioclase, amphibole and tourmaline rich bands. Location: Stone Mountain, Georgia, U.S.A.
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* (del) (cur) 07:07, 24 January 2007 . . Rolinator (Talk | contribs) . . 1600×1200 (440,358 bytes) (Roland Gotthard, takenatop Stone Mountain GA by author 2007, released to public domain. This image detailes pneumatolytic or metasomatic alteration of the metagranite at Stone Mountain which manifests as sodic plagioclase, amphibole and tourmaline rich fr)
{{Information |Description=Zones of alteration in a metagranite. This image detailes pneumatolytic or metasomatic alteration of the metagranite at Stone Mountain which manifests as sodic plagioclase, amphibole and tourmaline rich bands. Location: Stone Mo