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6 September 2019
Friday fold: Gonzen, Switzerland
Science writer Gabe Popkin shared two fold photos with me this week – both from near Sargans, Switzerland, adjacent to the Rhine River Valley and the border with Lichtenstein. The photos shows the mountain called Gonzen. There, Jurassic limestones crop out in a very wavy pattern: I don’t know the geology of this area in any kind of detail, but I decided to trace out a distinctive upper surface of …
24 May 2019
Friday fold: Riffelhorn (+xenolith)
Naomi Barshi shares this “deskcrop” Friday fold… Naomi says she found this fold: near the Riffelhorn, Gornergrat, above Zermatt, Switzerland. The sample has befriended my other show-off sample of a mantle xenolith from San Quintin, Baja California. Thanks for sharing, Naomi! The xenolith is a nice bonus!
8 March 2019
Friday fold: Dent de Morcles
The Friday fold is a recumbent anticline/syncline pair, deforming the K/Pg boundary in the Swiss Alps, as photographed from the air by Bernhard Edmaier.
20 July 2018
Friday fold: Alpine peak containing a high elevation recumbent fold
Via Twitter, a Friday fold from Maddy Rushing: #FridayFold, @callanbentley? pic.twitter.com/eaKIuuvFgB — Maddy Rushing (@komaddyite) May 25, 2018 This is in the Alps of Switzerland; I don’t know more about it than that. If you recognize the site or the geology, educate us in the comments!
15 June 2018
Friday fold: scenes from the Schilthorn cable-car
My friend Karen Aucker from NAGT’s Eastern Section shared these images (and a video!) of the folds she glimpsed from the cable-car on her way up the Schilthorn in Switzerland. I reckon they will do for our Friday fold: Thanks for sharing, Karen! These are great. Happy Friday, all!
8 December 2017
Friday fold: Alpine cross sections by Albert Heim
The Friday fold is a figure from a 1922 book about the geology of the Alps by Swiss structural geology genius and artistic master Albert Heim. Marvel at his gorgeous depiction of the internal and long-since-eroded structure of these mighty mountains.
8 June 2012
Friday fold: Brienz, Switzerland
Today’s fold comes to us from the Alps, courtesy of blog reader “Earth Mama.” She says: Attached is a photo of the outcrop, near Brienz, Switzerland, and a GE screenshot of the location. I saw this as I was looking out the train window, and was able to grab my camera in time. Best I could find is that the formations are dated to the Mesozoic (http://myweb.facstaff.wwu.edu/talbot/cdgeol/Structure/Fold/Folds1/Recumbent.html). First off, the …