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Commission on Tephrochronology @cot-iavcei.bsky.social · 01/06/2026

To all tephra fans, there will be a dedicated session "From Ash to Archive" to present your work on marine studies, eruptions chronologies and quantifications of volcanic events. Deadline postponed to June, 7th. ⏱️ When: October 19th to 22nd, 2026 📍Where: Santorini (Greece) & online 📝 Program below!

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Helen Innes @heleninnes.bsky.social · 22/05/2026

🚨🌋❄️Delighted to share our paper identifying Newberry Pumice tephra in Greenland ice at 686 CE, and investigating other 7th Century eruptions associated with climate cooling is now available online in Quaternary Science Reviews. 🌋❄️🚨 doi.org/10.1016/j.qu...

doi.org

Redirecting

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Danielle McLean @danmclean.bsky.social · 05/05/2026

🔔🌋Tonight is the @cot-iavcei.bsky.social social gathering at #EGU26 We will be meeting at 7Stern brewery from 8pm Note the kitchen closes at 9pm so please place any food ordered when you arrive. 🍲

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Christine S. Lane @chslane.bsky.social · 24/06/2025

Last Tues we were celebrating @jinheum.bsky.social’s PhD viva 🥳 Many thanks to examiners @harrietallengeog.bsky.social @simon-blockley.bsky.social for your wisdom & support. Jinheum also had a paper out [doi.org/10.1002/jqs.3730] & starts a postdoc in 2 weeks. Congratulations Jinheum!

Three adults in a colourful restaurant smiling for the camera in a row. They look proud and relaxed.

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Britta Jensen @tephrabird.bsky.social · 30/04/2025

Day 3 Field School. Jensen Reservoir and Cretaceous Beach deposits, Del Bonita uplands outside the reach of the Laurentide Ice Sheet - a remnant periglacial landscape, and the Rocky Mountains. Hello Waterton and the Purcell Super Group, 1.3 Billion yrs old. Geologists- the ultimate time travellers.

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Britta Jensen @tephrabird.bsky.social · 02/05/2025

Day 4: 1st geology field school. What a stunner of a day, Robin egg blue skies, perfect temperatures. The students are spoiled as they learn about the formation of the Rocky Mountains, visit the famous Frank Slide, and marvel at the bizarre melinite (Ti-rich garnets) bearing Crowsnest Volcanics.

Cameron Falls in Waterton townsite, Waterton National Park. A hanging valley leading into the main trunk valley filled by Waterton Lakes. Also cutting into 1.5 billion year old Waterton formation rocks. Some of the oldest in the Canadian Rockies. Also the place of the first oil and gas well - they have been thrust over the much younger organic rich Cretaceous western Canadian sedimentary basin rocks - which have the oil.

Frank Slide - massive collapse of Turtle Mountain in 1906 buried the town of Frank.

Lundbreck Falls and Crowsnest River flowing over Belly River (Cretaceous) group rocks. Flowing the same direction today as the rivers that deposited it.

Coming down off a kame terrace formed by the stagnating Cordilleran Ice Sheet that is the stunning home to the famous Prince of Wales hotel today.

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Britta Jensen @tephrabird.bsky.social · 03/05/2025

Day 5: 1st yr geology field school, Fernie-Radium. My favourite day, I get to go home to the East Kootenays. The structurally curious Rocky Mountain Trench, big bad-ass Cordilleran ice sheet geomorphology, complexly deformed Devonian limestone, and travertine and tufa at Fairmont Hot Springs. ⚒️🧪

Amazing climbing ripples of fine sand to silt, deposited as part of a kame terrace complex, likely in an ice marginal lake. So much sediment!!

Our mascot checking out old travertine mount just above the current pools at Fairmont hot springs.

The Kootenay River at Canal Flats where is flows into the trench to go south into the USA to eventually join the Columbia. Meanwhile, about 2 km north of us is Columbia Lake - the headwaters of the Columbia River that flows north. Lowest drainage divide ever.
And yes, if you stick your head in the water you can hear the sediment moving!!!

First stop of the day, overlooking the Kootenay River on the Fort Steele Warner Road. Outwash terraces, kame terraces, Roche moutonees of my!!

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Britta Jensen @tephrabird.bsky.social · 04/05/2025

Next we stop at a favourite: Saskatchewan Crossing. #strataday. Loess, paleosols, and three (!) volcanic ash: Mazama, Mount St Helens Yn and Bridge River. Doesn’t get much better, unless you like glaciers. We finish at Athabasca Glacier. Beautiful but heart breaking in her steady retreat. 🧪⚒️

TA Shaun, from VARG, in his element teaching the students about volcanic ash, you can see two clear in this picture, Mazama at his knee and he is looking at Mount St Helens Yn

A group of young Bighorn sheep by Athabasca Glacier - a classic site in the Rockies!

Student Lachlan looks to the distance inspecting end moraines with the Athabasca glacier behind him.

Saskatchewan River Crossing with the loess cap on the terrace to the right, full of silt, paleosols and tephra!

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Britta Jensen @tephrabird.bsky.social · 04/05/2025

Day 6: 1st year field school, Radium to Jasper. Last full field day, starting at the Columbia River by Radium, type example of an anastomosing river. Critical wetland habitat. Mapping massive thrust faults in Sinclair Canyon, showing the growing of the Canadian Rockies, another favourite 🧵

Teaching Assistant Shaun showing the crew some amazing slicken-sides and how the can help figure out direction of movement on a fault

Our dear mascot standing on a thrust fault trace pushing the hanging wall in the right direction! Pentaceratops strong!

Drag folds on another fault trace, marked by dinosaur. Also showing thrusting. Yes, compression built the Rockies! A classic fold and thrust belt.

Overlooking the Columbia River by Radium, a classic example of an anastomosing river - multiple channels, vegetated levees, very low gradient, wetlands, sand and silt, aggrading, check check check!

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Britta Jensen @tephrabird.bsky.social · 29/04/2025

Teaching EAS 110 First Year Field school. The badlands around Drumheller are as spectacular as ever. We also now have a mascot. #geology #fieldwork ⚒️

Fringed triceratops in their natural landscape - the new eas110 mascot.

Horsethief Canyon - just outside of Drumheller.

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Melaine Le Roy @subfossilguy.bsky.social · 21/03/2025

Athabasca Glacier (Rockies) 1917 | 2023 Most visited glacier in Canada! 🥇 First image dates back to 1906 📷 www.researchgate.net/publication/... Also known for subfossil wood 🌲 cdnsciencepub.com/doi/abs/10.1... And LIA record (max in 1844) www.sciencedirect.com/science/arti... mountainlegacy.ca

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David Ho @davidho.bsky.social · 15/03/2025

The Mauna Loa CO₂ record is the most iconic time series in the environmental sciences. Trump and his enablers are trying to kill it.

civilbeat.org

Climate Change Science On Mauna Loa Could Stop Amid Federal Cuts

The NOAA office in Hilo that supports that carbon dioxide sampling has been flagged for a possible lease cancellation.

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Paul Voosen @voosen.me · 06/02/2025

My latest: An inside look at EastGRIP, which drilled through the heart of Greenland's largest and most enigmatic ice stream. Featuring the amazing photography of Lukasz Larsson Warzecha.

science.org

Hole drilled into Greenland's heart reveals ice ready to slide into the sea

Unique drilling project has ominous implications for sea-level rise

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Shaun Woudstra @hyaloclastite.bsky.social · 02/02/2025

Introducing a piece of Mt. Edgecumbe, Alaska, to the more lively Stromboli, IT, as part of a new volcano socialization program.

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UAlberta Volcanic Ash Research Group @tephrotastic.bsky.social · 28/01/2025

To say things are grim right now is an understatement. So we would like to share a bit of fun. In honour of VARG PhD @hanaayousif.bsky.social finally adopting her furry feline, we present "THE CATS OF VARG". We start with the cat of the hour, Pliny! Yes, in honour of Plinian eruptions. #cats 🌋

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i am 40 fish all hungry for meat @carbidecarbon.bsky.social · 11/01/2025

How do the scientists that work with ancient ice cores resist the urge to lick them

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