A photo of gypsum.
By Geology and Ecology of National Parks
June 1990 (approx.)
![A photo of gypsum.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/bb20.jpg?itok=TCLrqgdI)
Detailed Description
Gypsum forms this unusual pattern of veins in old elevated stream terrace deposits along the River Road in southern Big Bend.
Sources/Usage
A photo of gypsum.