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Bob Fournier (left) and Don White (right) at the Y3 drilling site in Yellowstone National Park

By Yellowstone Volcano Observatory 1967 (approx.)
Bob Fournier (left) and Don White (right) at the Y3 drilling site in Yellowstone National Park
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Detailed Description

Bob Fournier (left) and Don White (right) at the Y3 drilling site in Pocket Basin adjacent to Ojo Caliente, Lower Geyser Basin, Yellowstone National Park, in 1967.  USGS Photo.

Sources/Usage

Public Domain.