Alamo Crater Impact Region (image) Geological Society of America Share Print E-Mail Caption This is a map view of the impact region outlining the Alamo impact crater and the possible location (dotted lines and question marks) of its complex crater features. Credit Retzler et al. and Geosphere Usage Restrictions Retzler et al. and Geosphere 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.