Fractures in East Texas Rock Cores (image) University of Texas at Austin Share Print E-Mail Caption Rock cores from East Texas containing fractures. The cores show how open fractures can host cement deposits, which can provide clues about the fracture environment and process. Credit Lander et al. Usage Restrictions include photo credit Share Print E-Mail 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.