Diapir modeling (IMAGE) University of Wyoming Caption Numerical modeling of sediment subducted beneath North American crust suggests that the sediment may buoyantly rise up through the mantle, like a lava lamp blob, and become attached to the base of the crust. Credit Jay Chapman Usage Restrictions None License Original 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.