An HVO geologist removes the sampling tube following the gas collection. Inserti
![image related to volcanoes. See description](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/img7503.jpg?itok=rB4PPbK9)
Detailed Description
An HVO geologist removes the sampling tube following the gas collection. Inserting the tube down into the degassing source limits contamination of the volcanic gas sample by atmospheric gases. USGS image by P. Nadeau.
Sources/Usage
Public Domain.