Euhedral plagioclase phenocryst from a Pleistocene lava collected on Shishaldin in 2018 in cross-polarized (XPL) and plain-polarized light (PPL). In cross polarized light distinctive crystal twinning is clearly visible, as well as a zoned rim due to changing extinction angles at different An contents.
Date: Oct 13th, 2021
Volcano(es): Shishaldin
Photographer: Loewen, M. W.
URL: avo.alaska.edu/image/view/178541
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
Volcano(es): Shishaldin
Photographer: Loewen, M. W.
URL: avo.alaska.edu/image/view/178541
Credit: Image courtesy of AVO/USGS.
Use Restriction: Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.
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