SPE 455 (IMAGE) Geological Society of America Caption This is the cover of The Geological Society of Americ's Special Paper 455, "Adventures through Deep Time: The Central Mississippi River Valley and Its Earthquakes," by Roy Van Arsdale. Credit Geological Society of America Usage Restrictions non-commercial, educational 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.