Taking Measurements at a Thermal Area

Detailed Description
USGS geologist Deborah Bergfeld measures the temperature of a thermal feature near Big Boiler at Bumpass Hell in Lassen Volcanic National Park.
Sources/Usage
Public Domain.
USGS geologist Deborah Bergfeld measures the temperature of a thermal feature near Big Boiler at Bumpass Hell in Lassen Volcanic National Park.
Public Domain.