Geologist Kristi Wallace sampling tephra deposits preserved in the snow north of Redoubt volcano after digging through alternating layers of snow and tephra in front of her. The helicopter which brought her to the site is parked in front of her. Image by Janet Schaefer for the Alaska Volcano Observatory/U.S. Geological Survey.

Geologist Kristi Wallace sampling tephra deposits preserved in the snow north of Redoubt volcano after digging through alternating layers of snow and tephra in front of her. The helicopter which brought her to the site is parked in front of her. Image by Janet Schaefer for the Alaska Volcano Observatory/U.S. Geological Survey.
SuperStock offers millions of photos, videos, and stock assets to creatives around the world. This image of Geologist Kristi Wallace sampling tephra deposits preserved in the snow north of Redoubt volcano after digging through alternating layers of snow and tephra in front of her. The helicopter which brought her to the site is parked in front of her. Image by Janet Schaefer for the Alaska Volcano Observatory/U.S. Geological Survey. by Alaska Volcano Observatory/Alaska Volcano Observatory is available for licensing today.
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Image Number:  4383-161Rights ManagedCredit Line:SuperStock / Alaska Volcano Observatory/Alaska Volcano ObservatoryCollection: Alaska Volcano Observatory Contributor: Alaska Volcano Observatory Model Release:NoProperty Release:NoResolution:3798×5064
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