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Date: 2006-06-20 14:11:40Volcanic rocks Igneous rocks Basalt Phenocryst Camas Washington Columbia River Basalt Group Cinder Cone and the Fantastic Lava Beds Petrology Geology Igneous petrology | Add to Reading ListSource URL: pubs.usgs.govDownload Document from Source WebsiteFile Size: 907,86 KBShare Document on Facebook |