Lower Mantle Spin Transition (IMAGE) Carnegie Institution for Science Caption Illustration of the possible location of carbonate spin transition in the lower mantle, courtesy of Sergey Lobanov. Credit Sergey Lobanov Usage Restrictions With credit 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.