You are browsing the archive for July 2010 - Mountain Beltway.
30 July 2010
Ripple marks
… And here are some ripple marks from a block of the same sandstone in the previous image. Nice! Hope everyone is doing well. Lots of good geological experiences to report on, buy it’s hard to write a substantive blog post from phone… You’ll have to wait until I’m back at a computer!
Mudcracks
Here’s a package of mudcracks from a block of riprap on the waterfront of Burlington, Vermont: Oh yeah….
18 July 2010
Gros Ventre landslide, Wyoming
Yesterday’s field work took us to this classic mass wasting site:
17 July 2010
Grand Teton
It’s late afternoon in Jackson Hole, with the sun dipping down behind the Tetons. I’m waiting for some students to finish up their hike in Cascade Canyon and ferry back across Jenny Lake. Here’s a snapshot of the moment:
14 July 2010
Van flag
The students had placed this flag on te van antenna when I came out this morning… The other side says “it’s too gneiss!”
13 July 2010
Folded Archean gneiss
Here’s a nice sample of folded gneissic banding in basement complex of the Gallatin Range, Montana. According to Dave Mogk of Montana State University (who I met in person for the first time on Saturday), these high grade metamorphic rocks are as old as 3.2 Ga (billion years old). They experienced temperatures as high as 750 degrees C, and pressures equivalent to 25 kilometers of depth in the crust. The …
12 July 2010
Morning plume
Greetings from Bozeman, Montana, where my students and I are on Day 3 of our Rocky Mountain Regional Geology class. Here’s a nice long example of plumose structure to start your Monday. More to come, now that I am back in the States and reconnected with my iPhone.
4 July 2010
Turkey update
Hey there folks, Long tıme no blog. I am enjoyıng Turkey. We spent several cool days ın Istanbul, checkıng out the awesome buıldıngs and twısty streets and great food there. Took a boat tour up the Bosphorus, walked across the Golden Horn. The Haghıa Sophıa ıs amazıng… a Chrıstıan cathedral datıng to Emporer Justınıan, then retrofıtted to be a Muslım mosque after the fall of Constantınople ın 1453 to Sultan …
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.