An Geologist collects a sample of lava, quenching it in a bucket of...
![An HVO geologist collects a sample of lava, quenching it in a bucke...](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img4245.jpg?itok=KbWPX7xD)
Detailed Description
An HVO geologist collects a sample of lava, quenching it in a bucket of water. Chemical analysis of the lava provides insight into changes in the magma plumbing system.