Geologic Map of Washougal Quadrangle
By Volcano Hazards Program
1905 (approx.)
![Geologic Map of the Washougal Quadrangle, Clark County, Washington ...](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/vhp_img1275.jpg?itok=BJ7OYWoA)
Detailed Description
Geologic Map of the Washougal Quadrangle, Clark County, Washington and Multnomah County, Oregon (Scientific Investigation Map 3257).