Lines in Hawaii (IMAGE) University of Washington Caption Lines in Hawaii. Repeated freeze-thaw cycles create lines when the stones are on more steeply sloping ground. New research provides insight into how these features form in frost-prone landscapes. Credit Bernard Hallet/University of Washington Usage Restrictions With credit 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.