Guillaume Duclaux

YouTube video by Zoltan Sylvester White Pocket from above

Some aerial footage of the deformed/liquefied Navajo Sandstone at White Pocket: www.youtube.com/watch?v=02zP...

Majestic lenticular clouds over the Patagonian Andes (near Aguilera Glacier)

The granite towers of Torres del Paine with a lake in the foreground

Torres del Paine granitic intrusion with Cretaceous sediments in the foreground and about the granite

Herd of guanacos with mountains covered with snow in the background

Felsic dyke crosscutting the Cretaceous sedimentary strata

Torres del Paine is another geological wonder of this region! Although the weather was a bit harsh, I was just amazed to see the granitic laccolith with my own eyes. Kudos: herds of guanacos and a puma

Serrano glacier steep tongue reaching an icy lake

Close up view to the glacier tongue reaching the lake

Balmaceda glacier

Following #ISAES2025 I have embarked from Puerto Natales to discover the Serrano and Balmaceda glaciers with a fantastic group of Antarctic geologists. The glacial landscape and the geology in the Magallanes region of Chile 🇨🇱 are breathtaking 🤩🏔️🧊❄️

Bow of a red ship 🚢

Monitors wall with scientific acquisitions

Rosette sampler for seawater in the moon pool room

Main deck

Yesterday I was among the lucky few who enjoyed a guided tour of the new Chilean ice breaker “Almirante Viel” and the onboard scientific facilities #ISAES2025 in Punta Arenas 🇨🇱

Photo of fluvial gravel from Barton Creek, Austin, Texas (A), output of the segmentation (B), size distributions of the major and minor grain axes (C), and the area-weighted size distributions (D). Major grain axis lengths are shown in blue, minor grain axis lengths in orange.

Short paper in @joss-openjournals.bsky.social on 'segmenteverygrain', a machine learning model for segmenting grains in images. Review process: a bit slow, but transparent, friendly, rigorous, and useful joss.theoj.org/papers/10.21...

Measuring rock slides is cool, but modelling rock slides is cool too. So why not do both? Come join us at the beautiful Côte d'Azur! We have a fully-funded PhD opportunity available in the framework of the ERC UNREST project. Application window is open until 25 August: emploi.cnrs.fr/Offres/Docto...

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Et hop

Scientists discover long-lost giant rivers that flowed across Antarctica up to 80 million years ago Large flat surfaces carved by ancient rivers deep beneath the East Antarctica are influencing how ice flows across the continent today, according to a new study.

www.livescience.com/planet-earth...

If it comes from the Alps this could be a piece of the Permo-Triassic Verrucano conglomerate (lithotheque.ens-lyon.fr/Lithotheque/...)

Science’s ‘Gollum effect’: PhDs bear brunt of territorial behaviour Survey respondents at all career stages report colleagues engaging in territorial and possessive behaviours — but early-career researchers are most often affected.

New study in #Nature reveals the 'Gollum effect': nearly half of surveyed scientists report territorial behaviors—data hoarding, gatekeeping—mostly during #PhD. Early-career researchers bear the brunt; 1 in 5 left academia as a result.
www.nature.com/articles/d41...
🧪

Volcanic Eruption in Deep Ocean Ridge Is Witnessed by Scientists for First Time (Gift Article) Researchers diving in a submersible in the eastern Pacific realized that the landscape they had studied the day before had been glassed over by fresh lava.

**BIG NEWS in the geology world!** For the first time, scientists spotted an active eruption along the mid-ocean ridge!!

They visited the hydrothermal vent the day before, where a vibrant ecosystem thrived in the sweltering water. The next day, everything was gone. ⚒️🧪

My latest for @nytimes.com

A geode with blue crystals

Close up view on blue crystal faces

Tuesday could be Strontium Sulfate day! Why not…

Clusters of pale blue celestite crystals from Madagascar ⚒️🧪

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To brighten your weekend: pink rhodonite crystals (manganese inosilicate) from Madagascar
🤩⚒️

Waterfalls within columnar volcanic rocks

Peridotite xenoliths in basanite

Who wants to see waterfalls inside an ancient lava lake? Well… who doesn’t?
This is the Ray-Pic waterfall in Ardèche (SE France). Beautiful columnar jointing in a Pleistocene basanite full of mantle xenoliths 🤩⚒️

Geology students interpreting a panorama

Panoramic view toward the East from Entrevaux (04) showing the Var valley and surrounding mountains

3D view of the surface geology wrapped over a digital elevation model

Exploring Nice’s backcountry geology with 2nd year students - near Entreveaux ⛰️⚒️

Extrusion experiment with plasticine, IPGP tectonics lab. Famous experiment with plasticine, analog to Asian tectonics and continental extrusion. See Tapponnier et al., 1982, 1986 and Peltzer & Tapponnier 1988

You can find a video of one of Tapponnier’s experiment here: vimeo.com/211638349

Long exposure picture of rocky outcrops along the Mediterranean

M-folds in kyanite-garnet micaschists / quartzite layers

Geology strudents mapping folded metamorphic rocks by the sea

Back from a week in the field with MSc students mapping and studying deformation in variscan rocks from the Maures-Tanneron Massif near St Tropez 😍

Quartz vein boudinage in a compositionally layered migmatitic gneiss

Quartz vein boudinage

What’s not to love with boudins! ⚒️

Bedmap3 is now out
rdcu.be/ecTmO

Wombats are awesome and if you’d like to know more about them check this out: theoatmeal.com/comics/wombats

Wombat (Vombatus ursinus) grazing

A wisdom of wombats (Vombatus ursinus) - mother and cub grazing

Echidna (Tachyglossus aculeatus) walking in the grass with Mount Maria in the background

Cardboard animals in a souvenir shop

And of course Aussie wildlife was there 🐾

Waterfalls with fern trees in luxurious forest

High waterfall in luxurious forest

Gum tree in front of a lake in alpine Tasmanian landscape

Sandstone cliffs by the sea with mountain peak in the background

How beautiful is Tassie?! 🇦🇺
Back from Antarctica I took a couple days off to explore parts of southern Tasmania with some mates (in Mount Field NP & Maria Island NP). The luxurious forests with fern trees and waterfalls felt like a trip to Carboniferous times.

Adelie penguins’ rookerie with sea ice and a glacier in the background

Geologist sampling rocks with snow and penguins in the background

Rocky islands with icebergs and clouds

Looking back to some fieldwork memories earlier this year…

Happy new year 2025 from Dumont D’Urville station in Adélie Land, East Antarctica… not the best weather for geology though

Red rhyolites of the Esterel massif viewed from the sea

Paddlers on tauati va’a in the foreground, the red volcanic rocks of the Esterel massif, and the snowy summits of the Mercantour massif in the back

One of the many pros of the French Riviera are the landscape and geology diversity… and canoeing on the Mediterranean on a sunny winter morning with a view on the snowy Alps