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14 July 2013
Rockies 5 concludes
My Rockies field course has wrapped up for another year – the fifth year in a row I’ve run this intermediate-level ‘regional field geology’ course in collaboration with Pete Berquist of Thomas Nelson Community College. We were fortunate to be joined by two other professional geologists this year: Chris Khourey of NOVA and Tom Biggs of the University of Virginia. It was a great group of students; no jerks among …
1 July 2013
Which is older?
Using your relative dating prowess to determine which of these two rock units is older, the schist (dark gray) or the granite (light pink): Click to enlarge Click to enlarge Justify your answer by citing a principle of relative dating.
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.