Crazy ice wedge day. 10-12 m high syngenetic ice wedge spanning the Late Pleistocene—early Holocene boundary. #klondike #permasfrost

Great new paper on long recurrence interval earthquakes along the Tintina Fault in central Yukon, led by @theronfinley.bsky.social. A nice merging of the rich glacial record of the Yukon with modern seismicity data to understand potential risk in northern Canada. Great work Theron!

Really pleased to share our new paper in GRL, documenting evidence of multiple Quaternary surface-rupturing earthquakes on the Tintina fault in the Yukon. doi.org/10.1029/2025... @faultydata.bsky.social @earthquakeguy.bsky.social @thatfaultguy.bsky.social @tephrafan.bsky.social

New paper with a large cast, but including a lot of permafrost, preserved horse fossils from the Yukon— work we did collaboratively over many years. Nice to see this out. Paper led by indigenous authors, highlighting deep connections horses and communities. www.science.org/doi/10.1126/...

The Ukrainian Sherpa UTV all conditions buggy, including amphibious. A spring fieldwork dream…not ours just interloping on their ride with some frozen materials.

Hi geoscientists! For those who avoid journals that are profit-focussed and abuse academic free labour (e.g., Elsevier, Nature), take a look at CJES. Non-profit and a storied history. I just joined as AE - journals like this are run with heart and integrity and need your support. #academicsky ⚒️🧪

New paper from Ben Stoker’s PhD with Martin Margold on the ice flow history of the NW Laurentide Ice Sheet. Not for the faint— clicking in at 41p. A huge effort to compile and organize into a consistent ice sheet history with contributions from many. tc.copernicus.org/articles/19/...

I try to stick to work here, but the ongoing impasse between Edmonton Pub. Schools and the Educational Assistants and Support Workers has gone on for more than a month, affecting our family. More than 1000 kids are being denied access to education. I wrote an Op-Ed @edmontonjournal.bsky.social

Today I finished my third (and final) year of #NSERC Geosciences Eval group. It’s a lot of work, but an enjoyable and rewarding form of service. A remarkable breadth of high quality thoughtful work, and a fair and consistent evaluation process in my experience.

In autumn, 1945, American photographer Gordon Parks flew up to Yellowknife on assignment with Standard Oil to do a photo feature but bad weather kept him from his intended destination. Instead he was invited to a nearby Dene community…

Behind a paywall but a nice profile of Beth Shapiro. We’ve been friends and worked together for 25 or so years. Always creative and now one of the biggest critics of de-extinction is redefining what it might mean for conservation genetics. Worth a read. www.washingtonpost.com/climate-envi...

#Permafrost is the most exceptional material for the preservation of past life on the planet. A gram of permafrost can have more than 10^9 fragments of DNA, representing the plants, animals and microbial communities when the material was accumulating. #Klondike #Beringia

View of the Mountain River joining the Mackenzie (Deh Cho) upstream of Fort Good Hope. The Mackenzie (looking north) widens with the addition of the coarse load, becoming braided upstream of the Ramparts. #Sahtu region, #NWT

#FossilFriday appreciation of our cover of the new #Beringia AAAR collection, a fossil rich locale on the Old Crow R. in Vuntut Gwitchin Territory. A river trip with 3 (then) graduate students. More than 1000 Pleist fossils: 70+ mammoth teeth, horses, hyena, camel, giant beaver, sloth and caribou.

Arctic Indigenous mapmakers are reclaiming the past, shaping their future. A new story by Jess Howard @permafrostpathways.bsky.social highlighting our collaborative mapping efforts with Esri and native Alaskan communities. permafrost.woodwellclimate.org/arctic-indig...

Congratulations Dr. Cocker on a successful PhD defence of ‘Arctic ground squirrel middens as palaeoecological archives of east Beringia’. Many thanks to Allan Ashworth for making the trip, and Beth Shapiro, Britta Jensen and JP Zonneveld for examining the dissertation. Great things ahead.

A view from this past September of talus and rock glaciers on the northeast facing aspect of the Norman Range, NWT in the #Sahtu area.

Check out the #permafrost pack and let me know if you should be on it! Please share far and wide and yell into the BlueSky from the frozen mountaintops to the Arctic tundra! go.bsky.app/UhFqWzJ

It came from the #permafrost… #FossilFriday— a juvenile horse lower leg with soft tissue from the Klondike. Distal long bones are the most common Pleistocene mummified remains recovered, having been partially scavenged. #Yukon #Beringia, Tr'ondëk Hwëch'in Territory.

I'm a Quaternary/permafrost geoscientist focused on ground ice, its vulnerability, and the exceptional things found in permafrost. I work with northern govts and communities to understand permafrost change with occasional digressions into the paleo world of permafrost.

Not sure if one tweets or skies here but hopefully Pleistocene mummies can find a home here. www.nature.com/articles/s41...