Photographs of the Area (IMAGE) Geological Society of America Caption Photographs highlighting (A) arroyos, (B) colluvial hollows, and (C) the asymmetric distribution of these features within the landscape. Photos A and B are looking approximately north and south, respectively. The hillslopes in photos A and B are approximately 100 m and 30 m tall, respectively. Photograph C is looking to the west and was provided courtesy of Juan C. Fernandez Diaz. The bottom of C spans ~1 km. Credit GSA Bulletin, S.A. Johnstone et al., and Photograph C provided courtesy of Juan C. Fernandez Diaz. Usage Restrictions Credit GSA Bulletin, S.A. Johnstone et al., and Photograph C provided courtesy of Juan C. Fernandez Diaz. 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.