The Bend in the Appalachians (image) University of Rochester Caption A dense, underground block of volcanic rock (shown in red) helped shape the well-known bend in the Appalachian mountain range. Credit Graphic by Michael Osadciw/University of Rochester. Usage Restrictions Please credit as above. 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.