Explore Search: Geologic Mapping
National News Release
![Portland Geological Map](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/search_result/public/thumbnails/image/Portland%20Geologic%20Map.png?itok=OSnQ-1YZ)
From Volcanoes to Vineyards - New Geologic Map Reveals Portland's Deep History
map
![Collage of USGS Maps.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/search_result/public/media/images/newsletter-search-default-thumbnails-real-time-maps_0.png?h=6bc574fb&itok=HLLitYZf)