Uranium Core (IMAGE) Colorado State University Caption Scientists sampled a 650-foot deep sediment core from roll-front uranium deposits at an unmined site at Wyoming's Smith Ranch Highlands. By characterizing the mineralogical and microbial composition of the sample, they discovered a new form of biologically produced uranium. Credit Amrita Bhattacharyya Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.