Sand Volcano (IMAGE) Columbia Climate School Caption A classic sign of a landscape disrupted by an earthquake: a vein of sand that has been pushed up through darker-colored sediments. Credit Photo by Liz Chamberlain Usage Restrictions Credit must be given. 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.