Colorado River Clam Chenier (IMAGE) Cornell University Caption At the Colorado River delta, cheniers of dead clam shells epitomize the carbon dioxide being added to the atmosphere upstream. http://www.news.cornell.edu/stories/2016/10/colorado-rivers-dead-clams-tell-tales-carbon-emission Credit Jansen Smith/Cornell University 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.