Thingvellir Rift Graben in Iceland (IMAGE) University of Gothenburg Caption Thingvellir rift graben in Iceland caused of far-field plate stretching. Credit Erik Sturkell Usage Restrictions None 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.