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29 August 2013
Guest post: Glaciation in the Tetons
This is the fourth of several guest posts that appear here this week, all written by students who participated in this past summer’s Regional Field Geology of the Northern Rocky Mountains course. by Tony Robinson Old Dominion University [youtube=”www.youtube.com/watch?v=XTWNmUNbBBU”]
21 August 2012
Glacial striations, in fact and fun
A few photos from the Canadian Rockies illustrated the characteristic “look” of glacial striations. Callan also demonstrates how they can be used for outright tomfoolery.
14 August 2012
My new favorite pater noster lake photo
Photo by Stephen Smith Alderson / Carthew lakes / summit area, depending on who you ask. Waterton Lakes National Park, Alberta.
8 August 2012
What those geologists were looking at
Yesterday, I showed you a scene of geologists (including me) clustered around some (presumably interesting) outcrop. I asked what you thought we might be looking at. Howard Allen, a denizen of this part of the globe, immediately identified the scene as that of the downstream end of the Athabasca Glacier. Several people guessed that we were looking at “glacial striations,” and that’s a good guess. Indeed there were plenty of …
6 August 2012
What are these geologists looking at?
Photo by Sarah O. Tune in tomorrow for the answer!
26 July 2012
Athabasca Glacier panorama
Click through for a big version… That’s the Athabasca Glacier, crown jewel of the Icefields Parkway in Jasper National Park, Alberta, Canada. Its lateral moraines show well its retreat and “deflation” in recent years.
5 July 2012
Floe Lake hike
Last summer, my wife and I spent some time in the Canadian Rockies. One of the things we did was to take a three-day backpacking trip to Floe Lake, in Kootenay National Park, British Columbia. We picked a rough couple of days for hiking – We got a lot of Canadian Rockies precipitation out there: we got rained on, hailed on, and snowed on during those three days. Here’s our …
21 June 2012
Plane views: “Is that the Tetons?”
Another batch of out-the-airplane window photos from March, on my flight from Reno, NV, to Minneapolis, MN. I looked out the window and saw a form that seemed familiar…. A slightly higher-contrast exposure: I was focused on that asymmetric mountain range in the distance. Is that the Tetons? And Jackson Hole to their east? I think it is! Zooming completely in with the pixelated “digital zoom” on the camera… Sure …
7 June 2012
Plane views: Flatlands edition
More photos from the flight from Reno to Minneapolis in March. The photos in today’s post come from the air above the Dakotas and Minnesota. First up: a series showing the intersection of natural patterns (presumably related to ground moraine) and the palimpsest geometric regularity of anthropogenic designs: Are these kettles? A close up look at one frozen lake, gleaming like a jewel in this dun landscape: Next, consider this …
27 October 2011
Pavement outcrops of strained Seine conglomerate
Picking up from the astonishing first couple of outcrops we saw of strained Seine Group metaconglomerate from the boundary between the Wabigoon and Quetico sub-provinces of the Superior Craton, our group moved on down the road. It was lovely clear fall weather near Fort Frances, and shockingly warm. Our third stop of the morning was a lunch stop atop a great “pavement” outcrop of the same strained metaconglomerate, showing different …
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.