21 March 2012
More folds from the White Mountains
Posted by Callan Bentley
I know we spent time last Friday on some nice folds in the Poleta (?) Formation in the White Mountains of California, but here are a few more that I saw on my way up to the Ancient Bristlecone Pine Forest…
Some elliptical objects caught my eye:
Traced out along the plane of bedding, these turned out to be boudins of a more competent layer, which was tightly folded higher up on the same outcrop:
Those are apparently recumbent (axial plane appears horizontal on this outcrop): not so hard to see how some of the bedding here shows structural evidence of having been inverted.
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.