Jim Vallance (USGS) describes geologically-young tephra (ash) deposits from Makushin that outcrop alongside the runway at Dutch Harbor. Photo credit: Jess Larsen, AVO/UAFGI, July 2015.
Image courtesy of the AVO/UAF-GI.
Please cite the photographer and the Alaska Volcano Observatory / University of Alaska Fairbanks, Geophysical Institute when using this image.
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