SIA3124: Scanning Electron Microscope image of Tephra

Photographer:USGS Photograph taken by D.R. Pevear
Copyright:Public Domain
Location:Yakima County, Washington

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Scanning electron microscope (SEM) image of abraded pumiceous shards and feldspar in tephra from the May 18 eruption of Mount St. Helens. Sample collected in Yakima.

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