19 March 2013
A closer look at the recumbent anticline from last Friday
Posted by Callan Bentley
Last week, the Friday fold was presented in GigaPan format only, which led to a concerned reader lamenting that he couldn’t see it on his mobile device. (GigaPans are Flash-based images; they don’t work on Apple devices in the standard GigaPan format, though there is a perfectly suitable workaround with two extra clicks.)
So, for the sake of this poor reader, who would otherwise be denied a view of this lovely fold, here are a few photos of the site, presented in the traditional jpg format:
So many trees! It made me ache for my chainsaw. Here’s a closer look at the fold hinge region in the corner of the quarry:
Another view, slightly to the left and emphasizing the 3D folded layer at right:
Click to enlarge
Same view, annotated:
And here’s a recumbent synform in the opposite corner of the quarry (two views from slightly different angles):
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.