USGS/AVO geologist Jordan Lubbers working on exposing a tephra section on Unimak Island. Jordan is standing in a 1 meter thick deposit of pumice that is probably from the Fisher caldera forming eruption.
Location:Latitude: 54.84293
Longitude: -163.67115
Image courtesy of AVO/USGS.
Please cite the photographer and the Alaska Volcano Observatory / U.S. Geological Survey when using this image.
Full Resolution.