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2 February 2022

Abundance, by Karen Lloyd

Callan reviews a new book about endangered species and ecosystem recovery in various parts of Europe.

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16 February 2021

Deep Time Reckoning, by Vincent Ialenti

Stereotypically, I think of anthropologists as scholars who head off into years-long sojourns embedded with indigenous peoples, learning their cultures, practices, and insights. Vincent Ialenti has shown me that modern anthropologists can study other groups too. Ialenti’s population of interest is a modern group of European geoscientists, nuclear engineers, and planners. Together, they are charged with planning for the integrity of a Finnish nuclear waste repository. But studying this group, …

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10 July 2020

Friday fold: Candigliano River, Italy

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 …

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19 June 2020

Friday fold: Scaglia Rossa chevrons at Lago di Fiastra

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 …

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10 April 2020

Friday fold: Sorrosal Falls, Pyrenees

Folded Eocene turbidites exposed on the face of a spectacular waterfall in the Spanish Pyrenees. It’s Friday; enjoy this fold!

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6 March 2020

Friday fold: an Extreme(adura) geological history question

The Friday folds are revealed in an elegant cross-section through fantastic rocks in the Extremadura region of Spain.

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13 September 2019

Friday fold: crinkled schist from Italy

AGU’s Chief Digital Officer Jay Brodsky offers up a fresh European fold for you today — and this one is on rather a smaller scale than Jay’s last Friday fold contribution… Click through for a bigger version. These are lovely crinkly folds in highly foliated rocks. I love boxy little crenulations like these. Jay tells me that this is from Graines, Italy, in one of the valleys of the Val …

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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 …

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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!

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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.

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22 February 2019

Friday folds: Sardinian tuff

It’s the last day of the work week. Some photos of isoclinal syn-depositional folding in Sardinian tuff will get your Friday off on the right foot.

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14 February 2019

Friday fold: an arch of gypsum in Sicily

Ahh, Sicily on a Friday morning. Join us to examine a spectacular arch of gypsum from the Messinian evaporite package.

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8 February 2019

Friday fold: Falte an der Riedbergpaßstraße im Allgäu

A Friday fold from Germany showing an overturned sequence of sedimentary layers. Bedding / cleavage relationships show which limb is tectonically inverted. Furthermore, this fold was an “Aha!” moment for the budding geological mind of a small boy.

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21 December 2018

Friday fold: Samaria Gorge, Crete II

The Friday fold is a guest submission from AGU’s new Chief Digital Officer, and shows a spectacular set of recumbent folds in Crete.

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16 November 2018

Friday folds: more deformation from Cinque Terre, Italy

A return to coastal Italy on this wintry Friday… You’ll recall that The Other Callan shared some fold imagery with us a few weeks back as he explored the Cinque Terre region of Italy. He is back in the States now, and has been kind enough to share his geology-themed photos with me, so I can share them with you. Take a gander: Several people more familiar with these rocks …

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2 November 2018

Friday fold: Refolded marble from Corsica

The Friday fold comes to us from Corsica via University of Washington structural geologist Darrel Cowan. It’s a marble that’s been folded *twice!*

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5 October 2018

Friday fold: Vernazza, Italy

For this Friday’s fold, we must journey to the storied Cinque Terre coastline of Italy, where we will encounter some mysterious turbidites…

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31 August 2018

Friday folds: Rifugio Fontana in the Dolomites

TGIF: “Thank Geology It’s Friday!”
Time for a fold or a dozen – let’s travel to the Italian Dolomites to see some kinky crumpled limestones…

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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!

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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: [youtube_agu id=RmxCN8Pte38] Thanks for sharing, Karen! These are great. Happy Friday, all!

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