DavidB4-bot
→top: clean up & uniformity
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CSGuy
no edit summary
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BrianCo
categorized
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DeanS
wikify
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New page: Term used to describe silica-rich volcanic rock or magma. <ref>[http://vulcan.wr.usgs.gov/Glossary/volcano_terminology.html Glossary of Volcano and Related Terminology (Miller, 1989)]</ref...
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