10 August 2011
A trio of weathering rinds
Posted by Callan Bentley
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About Callan
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.
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I would call those “Fairy Doors” =)
https://fbcdn-photos-a.akamaihd.net/hphotos-ak-snc6/263368_2305551364631_1424696117_32764764_1202075_s.jpg
Sorry for the long link
What were these rocks originally, before the ravages of time?
They are volcanic rocks of the Bear Lodge mountains; same igneous plugs as Devils Tower & many others in the area.