Boring Volcanic Field map and Portland Basin on a hillshade image. ...
By Volcano Hazards Program
1905 (approx.)
![Boring Volcanic Field map and Portland Basin on a hillshade image. ...](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img2998.png?itok=QnoUkXmg)
Detailed Description
Boring Volcanic Field map and Portland Basin on a hillshade image. Boring Volcanics shaded in orange and blue, vents are red circles, and Cascade-arc volcanic products in purple.