Callan Bentley This one is in my folder of ‘structure’ images on my computer, but it’s not one of mine. I’m not sure where it came from. A TinEye search turns up nothing. Perhaps one of you can tell me? Lovely subparallel kink bands… such gorgeous structure. Happy Friday!
Here are some rugose coral fossils (along with some cross-sectioned articulate brachiopod shells) to be seen in the Clearville member (~80 feet thick) of the Mahantango Formation, exposed on the north side of route 55, just west of the West Virginia / Virginia border. These fossils are cool in their own right (what fossils aren’t?) … Read more
Callan’s Rockies field course students document faulting and jointing in Red Rock Canyon, Waterton Lakes National Park, Alberta.
The Friday fold is found in Cretaceous rocks of eastern Alberta – but far beyond the tectonic influence of the Canadian Rockies. So what’s responsible for the folding?
In July, I found a dinosaur bone in Dinosaur Provincial Park! It was lying in a wash coming off a small mesa, and sure enough, when the students and I walked up the little draw, we came to in situ bones poking out of the cliff above. After showing it to the students, I put … Read more
An expert on the deltaic depositional setting of eastern Alberta’s Horseshoe Canyon Formation shares field evidence and expertise with Callan’s students.
In addition to the projects I linked to last week, here are a few more: Jessica H. made a Prezi about the Kananaskis Trail outcrops, with a bonus trip up to Peyto Lake. Sean D. made a PowerPoint tour of the sedimentary features we saw in the Great Plains. James focused on the Cougar Creek … Read more
The Friday fold is an outcrop in Yoho National Park that showcases differences between buckle folding and passive folding.
I’ve got some student work to share with you today. Like yesterday’s guest post on deltas growing into Canadian Rockies glacial lakes, my Rockies students are turning in their final projects – digital products that aim to serve the world at large by introducing key places in the Canadian Rockies to a wider audience. The … Read more
One of Callan’s “Canadian Rockies” field course students supplies a guest post about deltas that build out into glacial lakes.
My student Mercer Parker shot this one over to me the other day: Click to enlarge Those are the slim strata of the Rome Formation (a.k.a. Shady*), strongly deformed in the region adjacent to the Max Meadows (“M&M”?) Fault. Thanks, Mercer! _____________________________________________ * Will the real slim Shady please stand up?
I’ve had a great three weeks in the Canadian Rockies, but now I’m heading out. It’s been an honor and a privilege to teach in these fine mountains, among amazing rocks with talented colleagues and thoughtful students, and I’ve really enjoyed the past week of GigaPanning with my colleague Aaron Barth. Yesterday, Aaron and I … Read more
Greetings from the field… here’s a scene I contemplated yesterday…
A final guest Friday fold from reader Howard Allen, who I’m pleased to be meeting up with in Banff late next week… Howard writes the following in describing this lovely scene: Warspite Anticline, Peter Lougheed Provincial Park, Alberta. Photo is a telephoto shot (hence the strong blue alpine haze–the colour cast is an accurate rendition … Read more
What are these Border to Beltway students up to?… Clearly, they are all immersed in their field notebooks, sketching away. This was in March, in west Texas. There must be something worth drawing at this road cut… A clue can be seen on the wall of rock behind them. There, you can find features such … Read more
Spotted in the yard this morning: One fungus (yellow, cracked like a breadcrust) being consumed by another (whitish, hairy wisps). Close-up portraits…
Here’s a breccia that Dan Doctor and I found in a tabular zone within the Helderberg Group (Devonian limestones) in one of the massive new roadcuts along Corridor H. link Is it a fault breccia or a sedimentary breccia? The breccia was bedding parallel, which suggests it could be just another bed, but it’s so … Read more
Some folds this week from coastal exposures in western Boothbay Harbor, Maine, where I’m on vacation for one more day… Acadian metamorphics (schist, gneiss), with injected granite pegmatite that has also been folded (and boudinaged): Happy Friday!
Okay, I photoshopped that one up. This one too… Here are the originals… And, if you’re a scale-off-to-the-side-of-your-main-subject purist, here’s a different shot of this quintessential boudin: And, while we’re at it, here are some other fine boudins (of granite pegmatite) exposed along the coast of West Boothbay Harbor, Maine: Some nice coastal ecology to … Read more
Pemaquid Point, Maine, is a locally-owned and -managed park near an old lighthouse. I went there yesterday with my family. We’re on vacation in coastal Maine for a week. At Pemaquid Point, the action of waves have cleaned the rocks, and they offer a delightful three-dimensional look at Acadian-aged metamorphics and granite pegmatite dikes, with … Read more