Perspective view of the Continental U.S. showing an elevation surface of the top of crystalline Precambrian “basement” rocks
![Perspective view of the Continental U.S. showing an elevation surface of the top of crystalline Precambrian basement rocks](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/TopBasement.png?itok=PO5-GmEm)
Detailed Description
Perspective view of the Continental U.S. showing an elevation surface of the top of crystalline Precambrian “basement” rocks. Brown and orange colors depict the highest elevations; greens show the lowest elevations. Surface is incomplete in the western U.S. where there are no published “basement” maps or where crystalline Precambrian rocks are not present.
Sources/Usage
Public Domain.
Don Sweetkind (USGS) compiled from multiple published sources