Cover for Recollections of a Petrologist (IMAGE) Geological Society of America Caption This is the cover for Recollections of a Petrologist, edited by Davis A. Young. Credit Geological Society of America Special Paper 512 Usage Restrictions Geological Society of America Special Paper 512 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.