Spring 2015 Geospectrum (IMAGE) American Geosciences Institute Caption This is cover of the Spring 2015 Issue of Geospectrum. Credit American Geosciences Institute 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.