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Date: 2009-12-05 20:46:56Lava tubes Shield volcanoes Lava Pit crater Basalt Volcanic field Craters of the Moon National Monument and Preserve Lava Beds National Monument Geology Volcanology Volcanism | Ore Bin / Oregon Geology magazine / journalAdd to Reading ListSource URL: www.oregongeology.orgDownload Document from Source WebsiteFile Size: 1,89 MBShare Document on Facebook |