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USGS CMG InfoBank Geology School: obsidian

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Title Comment Keywords
Volcanoes Die With Changes In Plate Boundaries 13:20 - 14:07 (00:47) / 0.8 MB "James Sadd", volcano, "convergent plate margin", "Panam Crater", gas, eruption, crater, pumice, magma, vent, plug, dome, obsidian, viscosity, silica
Textures and Conditions 06:48 - 07:53 (01:05) / 1.6 MB "J. Lawford Anderson", crystal, phaneritic, granite, aphanitic, obsidian
Geology School Keywords
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URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/keypage/obsid.html
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Page Last Modified: Thu Oct 31 04:24:43 PDT 2013  (chd)