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21 December 2010
Travels of 2010
I’ve been asked to put up a post detailing travels from the year now concluding. You got it! The first day of January dawned for me in Buenos Aires, Argentina. I had just gotten done with one of the best trips I’ve ever taken, to Patagonia in December 2009. The capital of Argentina was a stop-over for a few days on the route back north to DC. On New Year’s …
GoSF3: Chert
Episode three in the multi-part series on the geology of San Francisco. This post focuses on the chert layers of the Marin Headlands
Callan Bentley is an assistant professor of geology at Northern Virginia Community College in Annandale, Virginia. He is particularly interested in structural geology and the evolution of the Appalachian mountain belt. Callan draws cartoons and writes for EARTH magazine. He lives in Washington, D.C.
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