River Ash

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251	PDF Document Add to Reading List Source URL: web.unbc.ca Language: English - Date: 2008-09-26 13:48:43 Northern Cordilleran Volcanic Province Finlay tephras Tephra Stratovolcanoes Volcanoes of British Columbia Mount Edziza Finlay River Volcanic ash Geology Volcanology Petrology
252	PDF Document Add to Reading List Source URL: earthjustice.org Language: English - Date: 2012-02-23 12:44:59 California Coal Earthjustice Sierra Club Environmental protection Environmental social science Fossil-fuel power station Powder River Basin Fly ash Environment Economic geology Energy
253	PDF Document Add to Reading List Source URL: pubs.usgs.gov Language: English - Date: 2006-03-28 11:15:03 Arsenic Fly ash Pyrite Bituminous coal Powder River Basin Sub-bituminous coal Chemistry Coal Matter