16 September 2016
Posted by Callan Bentley
Those are some lovely ptygmatic folds in a migmatitic gneiss from Rocky Mountain National Park in Colorado. The age of the rock is apparently Mesoproterozoic. Bill Burton, who has shared Friday folds before, took the photo in the park on the 100th anniversary of the founding of the National Park Service.
Callan Bentley is Associate Professor of Geology at Piedmont Virginia Community College in Charlottesville, Virginia. He is a Fellow of the Geological Society of America. For his work on this blog, the National Association of Geoscience Teachers recognized him with the James Shea Award. He has also won the Outstanding Faculty Award from the State Council on Higher Education in Virginia, and the Biggs Award for Excellence in Geoscience Teaching from the Geoscience Education Division of the Geological Society of America. In previous years, Callan served as a contributing editor at EARTH magazine, President of the Geological Society of Washington and President the Geo2YC division of NAGT.
Other geobloggers are writing about