Side View of Cascajal Block (image) Brown University Share Print E-Mail Caption Side view of Cascajal block, Veracruz, Mexico. Credit Image courtesy of Stephen Houston Usage Restrictions EMBARGOED WITH PRESS RELEASE UNTIL SEPTEMBER 14, 2006, 14:00 EST. 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.