USGS scientists carrying an auger to a drill hole for seismic survey
Detailed Description
USGS scientists Robert Sickler (left) and Rufus Catchings (right) carrying an auger to a drill hole for seismic survey.
Sources/Usage
Public Domain.
USGS scientists Robert Sickler (left) and Rufus Catchings (right) carrying an auger to a drill hole for seismic survey.
Public Domain.