Portland Geologic Map
![Portland Geological Map](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Portland%20Geologic%20Map.png?itok=iACrAw7R)
Detailed Description
A new digital geologic map of the greater Portland-Vancouver-Hillsboro metropolitan area of Oregon and Washington will support emergency response, conservation, agriculture and recreation. https://pubs.er.usgs.gov/publication/sim3443
Sources/Usage
Public Domain.