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16 October 2011
A graphical dalliance
I read an article in the current issue of Physics Today with interest. It deals with the nature of scientific controversies, as percieved by the public and by specialists in the field in question. The author, Steven Sherwood, compares the origin of the ideas of a heliocentric solar system, general relativity, and human influence on the Earth’s climate. Each of them follows a similar pattern, he argues, with the initial …
12 September 2011
Clinker
“Clinker” is an interesting rock type seen in Wyoming’s Powder River Basin. It forms when a coal seam catches fire, and cooks the rock above and below it, including the potential for partially melting the strata immediately above. Check out a few images of this intriguing rock here.
25 January 2011
Uncommon Carriers, by John McPhee
Over the weekend, hideously cold temperatures kept me indoors. I baked a cake, I went to see the new movie “True Grit” (excellent), and I read the 2006 compilation of John McPhee’s writing on transportation, Uncommon Carriers. Like most everybody I know, I came to McPhee based on his geology writings — the quartet of books that were collectively republished en masse in 1998 as Annals of the Former World, …
Uncommon Carriers, by John McPhee
Over the weekend, hideously cold temperatures kept me indoors. I baked a cake, I went to see the new movie “True Grit” (excellent), and I read the 2006 compilation of John McPhee’s writing on transportation, Uncommon Carriers. Like most everybody I know, I came to McPhee based on his geology writings — the quartet of books that were collectively republished en masse in 1998 as Annals of the Former World, …
24 December 2010
GoSF6: Graywacke turbidites
The geological tour of San Francisco continues with an examination of the graywacke deposits of the
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.