Horizontal Motion of Ice Stream (image) California Institute of Technology Share Print E-Mail Caption As the tide falls, the floating Filchner-Ronne Ice Shelf grounds out, slowing down the progress of the Rutford Ice Stream. When the tide rises, the ice shelf floats again, allowing the flow of the ice stream to speed up. Credit B. Minchew/Caltech Usage Restrictions For use in news stories only Share Print E-Mail 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.