Backscattered electron image of tephra sample erupted from Veniaminof and collected in Perryville on October 26, 2018. Most grains are composed of an andesitic matrix glass with abundant plagioclase, clinopyroxene, and olivine microlites. Sample provided by A.S. and images taken on a JEOL 6510LV Scanning Electron Microscope.
Image courtesy of AVO/USGS.
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