Due to the US Government shutdown, the Smithsonian is temporarily closed. The Global Volcanism Program website will remain available but will not be monitored or updated. Status updates will be available on the Smithsonian homepage.
Logo link to homepage

Image GVP-05345

A geologist examines pyroclastic deposits (above hand) from a violent eruption of Half Cone less than 500 years ago. The Half Cone layers overlie dark gray phreatomagmatic deposits from Surprise tuff cone in Aniakchak caldera. The Half Cone eruption produced about 1 km3 of tephra and resulted in truncation of the SE side of the cone. Photo by Game McGimsey (Alaska Volcano Observatory, U.S. Geological Survey).

A geologist examines pyroclastic deposits (above hand) from a violent eruption of Half Cone less than 500 years ago. The Half Cone layers overlie dark gray phreatomagmatic deposits from Surprise tuff cone in Aniakchak caldera. The Half Cone eruption produced about 1 km3 of tephra and resulted in truncation of the SE side of the cone.

Photo by Game McGimsey (Alaska Volcano Observatory, U.S. Geological Survey).

Creative Commons Icon This image is made available as a Public Domain Work, but proper attribution is appreciated.

Galleries: Fieldwork

Keywords: volcanologist | field work | stratigraphy | outcrop | tephra | geology | deposit | ashfall


Aniakchak
Global Volcanism Program  ·  Department of Mineral Sciences  ·  National Museum of Natural History
Smithsonian Institution  © 2013 & Terms of Use | Privacy Policy   ·