Dr. Guy Gelfenbaum
By Communications and Publishing
January 2017 (approx.)
![head shot of man](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/IMG_1076des_cropped_UseThisOne.png?itok=Bm49agUz)
Detailed Description
Dr. Guy Gelfenbaum, geologist and director of the USGS Pacific Coastal and Marine Science Center.
Sources/Usage
Public Domain.