Image: Dacite-ThinSection-USGS
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Dacite-ThinSection-USGS.jpg (600 × 480 pixels, file size: 102 KB, MIME type: image/jpeg)
Description: Thin section image in crossed polars of a Dacite sample from a dome in Mount St. Helens. Image by United States Geological Survey, a federal scientific agency.
Title: Dacite-ThinSection-USGS
Credit: http://lcc.ctc.edu/departments/natural_sciences/pictures/archive/2005/image_wk041705MSHdacite.xtm
Author: United States Geological Survey
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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