Erosional Pleistocene Shorelines in Surprise Valley, California, USA (image) Geological Society of America Share Print E-Mail Caption Erosional Pleistocene shorelines in Surprise Valley, California, USA. (Photo credit: Anne Egger). Credit (Photo credit: Anne Egger). Usage Restrictions Credit Anne Egger and Geology. 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.