Finger Rafting (IMAGE) Yale University Caption Finger rafting is the block zippered pattern that forms when thin ice sheets floating on water collide creating "fingers" that push over and under each other alternately. This photo was taken off the Antarctic coast. Credit W.F. Weeks Usage Restrictions with credit given 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.