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29 January 2019

The Parallel Roads of Glen Roy

What can we learn from Scotland’s Parallel Roads of Glen Roy?

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6 August 2014

Guest post: Glaciolacustrine deltas in the Canadian Rockies

One of Callan’s “Canadian Rockies” field course students supplies a guest post about deltas that build out into glacial lakes.

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10 December 2013

The trail to Crypt Lake

Today, I’d like to share some images with you from Waterton Lakes National Park in Alberta, Canada. This is the Crypt Lake hike, a popular (but grueling) hike in the park. It starts at the Waterton Marina, across Emerald Bay from the Prince of Wales Hotel. Mount Crandell and the Bear’s Hump are visible in the distance. This image can be made much bigger if you click on it. Click …

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16 October 2012

Plane views: Leftovers

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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.

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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 …

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22 March 2012

Plane views

Here are some photos out the window of my flight home from California the week before last… Snow on the north sides of mountains, but not on the south sides (view is from the south towards the north): Same thing here: And again… And again… it would appear that our route from Reno to Minneapolis had us routed over the northern hemisphere! Variation on the same theme: light-colored sand deposits …

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8 August 2011

Climbing Darton Peak

Callan embarks on an exhausting climb of a major summit in the Wyoming Bighorn mountains, a peak named in tribute of one of his geological heroes. Come join the trek to the top of Darton Peak!

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5 July 2011

Varves from Yellowstone Lake

The other day, driving south through Yellowstone on our way to the Tetons, I stopped to give my students the obligatory look over Yellowstone Lake’s West Thumb, looking east towards the snowcapped Absaroka Range in the distance. But in addition to a lovely view and a few birds, we found something really cool… Those are varves, seasonally-laminated couplets of sediment (light = summer; dark = winter) that are made of …

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9 December 2010

Animated laminae

More of the new scientific medium* I showed you on Wednesday: animated GIFs of super-small stuff, to give a sense of depth. This time, I included a 1 mm scale bar: These are laminations of silt and clay in the rhythmites of the lower Konnarock Formation. If the above image moves too fast for your eye to keep up with, here’s another version of it, which is set to a …

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