JD Valley Diagram - Liz and Matt - Tephra - Document - PDFSEARCH.IO

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Date: 2013-08-09 12:01:42 Igneous petrology Tephra John Day Formation John Day Fossil Beds National Monument Large igneous provinces Ignimbrite Basalt Tuff Columbia River Basalt Group Geology Volcanology Volcanic rocks		JD Valley Diagram - Liz and Matt Add to Reading List Source URL: www.nps.gov Download Document from Source Website File Size: 790,21 KB Share Document on Facebook

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