Phinney and Rittenour Correlation Plot (IMAGE) Geological Society of America Caption Correlation plot between soil burn index (expressing how severely the soil has been burnt) and quartz luminescence intensity. Plot created by Phinney and Rittenour. Credit April Phinney Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.