A guest post by Nicholas Rossi, a student in Callan’s Canadian Rockies field course. Turtle Mountain is located in the Blairmore Range in Alberta Canada about 160km south of Calgary. It is the site of the Frank Slide, a landslide of over 90 million tons of rock that gave way on Turtle Mountain’s East side … Read more
Cretaceous clams from the final big transgression of the Western Interior Seaway, the “Bearpaw Sea”: We saw these last month at Devil’s Coulee in southern Alberta. They’re big!
Photo by Stephen Smith Alderson / Carthew lakes / summit area, depending on who you ask. Waterton Lakes National Park, Alberta.
The Friday fold is a kink fold in thinly-laminated limestone from the same site as yesterday’s mysterious orange oncoids.
Callan presents a mystery rock found in blocks of sedimentary rock on a talus slope near the Consolation Lakes in Banff National Park, Alberta. Are they orange oncolites? Or alien embryos? 🙂
Ever seen an armored mud ball? In this post, Callan encounters a small herd of these geological oddities in a coulee in southern Alberta.
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 … Read more
Photo by Sarah O. Tune in tomorrow for the answer!
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”:
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 … Read more