Pikes Peak granite. Denver, Colorado
![Pikes Peak granite. Denver, Colorado](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/cir1357_ch6_photo05_granite_20130408_DENV.jpg?itok=TeXtMZ-S)
Detailed Description
Photo of Pikes Peak Granite from USGS Circular 1357 "Water Quality in the Denver Basin Aquifer System, Colorado, 2003 - 2005." Sediments from the Pikes Peak granite have been weathering for millions of years are one source of uranium and radon in the Denver Basin aquifer system.
Sources/Usage
Public Domain.