Geologists in Little Dipper boat on Grand Prismatic Spring
By Yellowstone Volcano Observatory
1996 (approx.)
Detailed Description
Yellowstone National Park employees Rick Hutchinson (right) and Jim Peaco (left) guide the specially designed Little Dipper boat into the boiling waters of Grand Prismatic Spring to collect measurements of the temperature and structure of the feature. National Park Service photo by Josh Robbins in 1996.
Sources/Usage
Public Domain.