Dune Hole (IMAGE) Geological Society of America Caption This is an example of a hole in Mount Baldy -- all that remains of a buried oak. Credit Photo courtesy Erin Argyilan. Usage Restrictions Photo courtesy Erin Argyilan. 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.