http://digfir-published.macmillanusa.com/earth_imagemaps/earth_imagemaps_igneousrocks.html
Chapter
1. Igneous Rocks
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http://digfir-published.macmillanusa.com/earth_imagemaps/earth_imagemaps_igneousrocks_dlap.xmlDLAP questions57276806757a2e8076000000