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Christy Till, a scientist at Arizona State University points to one of the cryst

By Volcano Hazards Program
image related to volcanoes. See description
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Detailed Description

Christy Till, a scientist at Arizona State University points to one of the crystal black box recorders in the Scaup Lake lava flow, which erupted at Yellowstone around 256,000 years ago. Work performed under National Park Service permit YELL-2015-SCI-6078. Photo by Karalee Brugman.

Sources/Usage

Public Domain.