7 August 2020 12:02 in devonian, folds, Friday Fold, gigamacro, gigapan, limestone, structure, valley and ridge, west virginia by Callan Bentley
I went on a day of field work last week to Corridor H, West Virginia, to help make drone-based photogrammetric 3D models of the huge outcrops there. One site we stopped at is this beautiful V-shaped syncline in Devonian-aged Helderberg Group limestones. Click to enlarge Here are two layers traced out: Here is a GigaPan that Alan Pitts shot of this outcrop several years ago, when it was a bit …
31 July 2020 11:57 in blue ridge, cambrian, folds, Friday Fold, national parks, quartz, sandstone, valley and ridge, virginia by Callan Bentley
I spied an anticline last weekend while engaging in a day of solo geologizing along Skyline Drive in Shenandoah National Park. At Two Mile Run Overlook, I gazed west toward the southern tip of Massanutten Mountain, and noted what appeared to be an anticline in the Blue Ridge foothills: Annotated: And here it is in Google Maps, with the perspective rotated to looking ~along strike to the north, and I …
24 July 2020 10:33 in folds, foliation, Friday Fold, metamorphism, piedmont, virginia by Callan Bentley
Exploring his new digs in Charlottesville, Callan is introduced to a large exposure of phyllite at a dam’s spillway. The foliation there is folded in many ways. Share in a dozen field photos of the site…
17 July 2020 14:13 in faults, folds, Friday Fold, montana, rockies by Callan Bentley
The Friday fold is spied below, in the Montanan landscape near Dillon, from an airplane high above…
Tags: featured
10 July 2020 10:42 in europe, folds, Friday Fold, italy, mammals by Callan Bentley
Reader Michael Hiteshaw spotted some amazing folds this week while watching Kayak Session TV on YouTube. Though there’s a dramatic arc of “saving” a deer, both Michael and I felt our eyes drawn to the canyon walls where there are gorgeous folds in several sizes and shapes, with an emphasis on chevron folds: The video description on YouTube reads: Fabulous action by whitewater kayaker Fabrizio “Gass” Capizzo who saved …
Tags: featured
19 June 2020 11:10 in 3D, europe, folds, Friday Fold, italy, limestone by Callan Bentley
My friend Alan Pitts is orchestrating a virtual field camp for George Mason University this summer, utilizing outcrops in central Italy’s Apennine Mountains. Here’s a 3D model he just posted of one of the most impressive outcrops there: the chevron folds in the Scaglia Rossa limestones at Lago di Fiastra. I featured the site as a Friday fold 3 years ago when Alan took me there in person, but this …
5 June 2020 12:07 in british columbia, canada, folds, Friday Fold, jurassic, sediment, shear zones, structure, triassic by Callan Bentley
Reader Christian Gronau writes with this Friday fold contribution: Greetings from Cortes Island, BC – at the opposite end of the Strait vis-a-vis Lopez Island. Your Mountain Beltway blog is always of interest, and I have been following it for several years by now. Thank you for putting the effort into this worthwhile website. Quite regularly your posts elicit “echoes” and make me go back to some of my own …
29 May 2020 11:10 in folds, Friday Fold, structure, washington (state) by Callan Bentley
The Friday fold shows some sheared quartz-filled tension gashes in sandstones of one of the San Juan Islands in Puget Sound.
Tags: featured
22 May 2020 11:14 in folds, Friday Fold, gigapan, glacial landforms, google earth, mesoproterozoic, montana, national parks, proterozoic, sediment by Callan Bentley
Some web research led to a serendipitous discovery and further exploration. Wherever you’re sheltering in place, you don’t have a view that’s this grand. Slip away for a few moments to the high country of Montana’s Glacier National Park, where an anticline may be seen in the towering cliffs…
Tags: featured
15 May 2020 11:10 in argentina, cretaceous, folds, Friday Fold, glacial landforms, lakes, south america by Callan Bentley
Zoltán Sylvester brings us this Friday’s fold: And there’s more where that came from: These are deepwater strata of the Lower Cretaceous Rio Mayer Formation, exposed near Lago Argentino, Argentina, south of the lake’s northwest “arm,” about here. They were deformed so exquisitely during Andean mountain-building. Zoltán is a talented photographer, and you should check out more of his work here.