Backscatter Electron Image (BSE) mosaic of tephra erupted from Shishaldin Volcano on January 19, 2020. Sample collected in False Pass, AK by Melanie Hoblet. The image is 8.6 mm accross showing a cross section of grains separated from the 125-250 µm size fraction. 75% of grains are glassy (medium gray) with sparse microlites and phenocrysts of plagioclase (dark gray), olivine (light gray), and Fe-Ti oxides (white). Image taken with a JEOL 6510LV Scanning Electron Microscope.
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
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