You are browsing the archive for August 2012 - Page 3 of 3 - Mountain Beltway.
6 August 2012
What are these geologists looking at?
Photo by Sarah O. Tune in tomorrow for the answer!
3 August 2012
Friday fold: lower Martinsburg Formation near Bixler’s Ferry
The Friday fold is presented in photo, annotated photo, and GigaPan formats. It’s a cleaved anticline in lower Martinsburg Formation limy slate from Page County, Virginia. See if you can spot Mr. E. coli in the GigaPan!
2 August 2012
Weathering rind
A cobble of green Belt/Purcell argillite, exposed on the trail to Crypt Lake in Waterton National Park, Alberta, displaying a well-developed “weathering rind”:
1 August 2012
Cottonwood trees being consumed by caterpillars
In Waterton Lakes National Park, Alberta, my students and I camped under the shade of cottonwood trees… But some of the cottonwoods’ branches were looking a little thin… Caterpillars were munching on their leaves. And some trees had been completely denuded by the voracious little larvae: All three photos are taken on roughly the same scale (note the Moon as a reference point in each!).
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.