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Unuk River waterfalls from old lava pipes

By Alaska Science Center
Unuk River waterfalls from old lava pipes. Volcanic lava pipes form as the result of violent eruptions of deep-origin volcanoes.
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Detailed Description

Unuk River waterfalls from old lava pipes. Volcanic lava pipes form as the result of violent eruptions of deep-origin volcanoes. The Unuk River is one of the transboundary watersheds of Southeast Alaska. Visit USGS Transboundary River Monitoring in Southeast Alaska for more information about our research.

Sources/Usage

Public Domain.

Photo by Jennifer Hamblen, U.S. Geological Survey