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Jeff Peakall

@hyperpycnal.bsky.social
202 followers 121 following 40 posts

Geologist. Into: sediments and flows, bedforms, injectites, tsunami, nuclear waste clean up

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Jeff Peakall @hyperpycnal.bsky.social · 04/09/2026
New paper out, and what a title! Led by the brilliant Yan Li along with an all star cast. Learning From Crushing Failures: Changes in Physical Properties Reveal the Mechanics of Submarine Carbonate Landslides onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Learning From Crushing Failures: Changes in Physical Properties Reveal the Mechanics of Submarine Carbonate Landslides
Changes in the physical properties of calcareous ooze between intact weak layers and glide planes within the same stratigraphy provide new constraints on the deformation processes and mechanical fact...
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Jeff Peakall @hyperpycnal.bsky.social · 30/08/2026
You are in exotic parts. Hope the wind drops.
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Jeff Peakall @hyperpycnal.bsky.social · 08/08/2026
At the premiere for my first movie. Man in bookshop 2 was extraordinary! Check out the trailer on youtube
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Jeff Peakall @hyperpycnal.bsky.social · 30/07/2026
Thanks so much for searching for and finding these, they are stunning chevrons! As you say they add yet further support for our paper on the Dongpo Biota.
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Jeff Peakall @hyperpycnal.bsky.social · 22/04/2026
Guardian story on our new paper that is out today. www.theguardian.com/science/2026...
theguardian.com
Mud-rich coastline made 2011 Japan tsunami far more destructive, study finds
Analysis of video footage reveals how wave changed as it travelled over mud-rich rice paddies, exerting more force
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Reposted by Jeff Peakall
Duncan McIlroy @dmcediacaran.bsky.social · 14/02/2026
Earlier this year there was an article on the beautiful new #Ediacaran #Dongpo Biota in China, it has some lovely fossils in it. Well worth a look! There were also some things interpreted as fronds that we consider to be abiogenic uninterrupted Chevron marks. doi.org/10.1016/j.pr...
Comparison of the frondose features in the Dongpo Formation with uninterrupted chevron marks (A−D) and the Ediacaran Charnia for comparison (E). (A) Uninterrupted chevron marks from the Carboniferous Gull Island Formation, Ireland (modified from Doyle and Hoey, 2022); (B) and (D) frondose forms from the Dongpo Formation (modified from Wang et al., 2026); (C) uninterrupted chevron marks from the Lower Silurian Aberystwyth Grits, Wales (modified from Dżułyński and Walton, 1965); (E) Charnia ewinoni from the Ediacaran of Newfoundland (modified from Pasinetti et al., 2025). All scale bars are 1 cm. Portions of the branch-like structures highlighted in (B-D), primary branches in (E) are offset not opposite and have second (red) and third order branches (green) highlighted as is typical of Ediacaran rangeomorphs.
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Jeff Peakall @hyperpycnal.bsky.social · 16/02/2026
Thanks to Duncan McIlroy @dmcediacaran.bsky.social for involving me in this study looking at whether purported Ediacaran fronds are real or whether they might be abiotic sole marks. There are remarkable similarities!
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2026
Good to hear.
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Jeff Peakall @hyperpycnal.bsky.social · 06/02/2026
Oh no. Hope you are on the mend.
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Jeff Peakall @hyperpycnal.bsky.social · 17/11/2025
My work office flooded yet again following Storm Claudia. Maybe back in it early 2026. Will be back hot desking in the PhD office once more.
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Jeff Peakall @hyperpycnal.bsky.social · 19/09/2025
It has been absolutely fascinating to take much of what we and others have been working on in deep marine systems and apply this to tsunami deposits in coastal lakes. Very excited about this piece of work!!!
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Jeff Peakall @hyperpycnal.bsky.social · 19/09/2025
We then examine how the different sediments are formed using advances in process sedimentology. Turns out tsunami form sediment gravity flows in deeper lakes, and hybrid event beds (reflecting spatial and temporal changes in flow rheology) just like those in deep marine systems.
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Jeff Peakall @hyperpycnal.bsky.social · 19/09/2025
Tsunami vs Storms. Here we show unequivocal diagnostic criteria for differentiating between these in coastal lakes and lagoons based on the sedimentological records. Led by the astonishing Patrick. www.sciencedirect.com/science/arti...
sciencedirect.com
Tsunami versus storms: Diagnostic sedimentary criteria in coastal lakes, lagoons and sinkhole deposits
Sedimentary deposits of coastal flooding by tsunamis and storms extend archives of these events across millennia. However, the utility of these record…
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Jeff Peakall @hyperpycnal.bsky.social · 21/07/2025
Personally this is my 22nd Sedimentology paper. One wonders if it might be the last given all that is happening at the IAS.
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Jeff Peakall @hyperpycnal.bsky.social · 21/07/2025
Great to see this paper out on turbidity currents interacting with slopes, and how high angle differences between sole marks and ripples can occur. Overturns ideas that have stood for 3 decades! onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Three‐dimensional gravity current interactions with oblique slopes: Deflection, reflection and combined‐flow behaviours
Gravity currents interacting with planar slopes have been thought to always ‘reflect’ a component of flow orthogonal to the slope irrespective of the flow incidence angle. Incoming flows are argued t....
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Jeff Peakall @hyperpycnal.bsky.social · 15/07/2025
Yes, very odd. It is normally me in the gown!
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Jeff Peakall @hyperpycnal.bsky.social · 15/07/2025
As settings go, it is quite an impressive place to graduate! The eldest will be up on stage later. Looking forward to it!
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Jeff Peakall @hyperpycnal.bsky.social · 07/07/2025
Brilliant!!!
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Jeff Peakall @hyperpycnal.bsky.social · 01/07/2025
The coke that arrives at the cafe. Is it a sign?
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Jeff Peakall @hyperpycnal.bsky.social · 26/06/2025
Nearly 2 hours now in the Q to register at the IAS Huelva meeting. By some margin the worst organised conference I have attended in 35 years! The sessions started long ago!
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Jeff Peakall @hyperpycnal.bsky.social · 26/06/2025
Moving at around 1 m per minute and a half.
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Jeff Peakall @hyperpycnal.bsky.social · 26/06/2025
The Q for registration at the IAS meeting.
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Jeff Peakall @hyperpycnal.bsky.social · 16/02/2025
Another paper on the wonderful world of cohesive sediments - this time looking at salt marshes. Once upon a time I just worked on sandstones, but then I saw the light. Led by the brilliant Juliet Rounce. www.intechopen.com/online-first...
intechopen.com
Depositional and Erosional Behaviour of Cohesive Sediments in Estuarine Saltmarsh and Mudflat Environments
Management of aquatic environments relies on the accurate prediction of sediment transport via numerical models. Knowledge of erosional and depositional behaviours in the muddy sediments dominating th...
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Jeff Peakall @hyperpycnal.bsky.social · 16/02/2025
Revisiting the black shales depositional enigma! This one has taken a while, but delighted to see this out at last. With a stellar cast, and me. onlinelibrary.wiley.com/doi/10.1111/...
onlinelibrary.wiley.com
Revisiting the black shale depositional enigma: Transport processes and contrasting sediment sources in a heterolithic basin fill – Bowland Basin, England
Factors that control the accumulation of organic-rich shales are keenly debated and include basin redox variations, sediment provenance and diverse depositional processes. The relative importance of ....
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Jeff Peakall @hyperpycnal.bsky.social · 16/02/2025
Coverage of the Sedimentology mass resignations at Retraction Watch. Note: 13 of 32 AEs have resigned (40%); the website was already out of date, so figures herein are not quite right. retractionwatch.com/2025/02/14/e...
retractionwatch.com
Editors resign from sedimentology society journal amid ‘extraordinary and troubling times’
The chief editors of the journal Sedimentology have resigned, along with nearly a third of its associate editors, as the society running the title amended its publishing contract.  The Interna…
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Jeff Peakall @hyperpycnal.bsky.social · 10/02/2025
The crisis at the journal Sedimentology keeps deepening. Following the letters from present and past Presidents making it clear there will be no changes, there has been another resignation from among the remaining Associate Editors
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Jeff Peakall @hyperpycnal.bsky.social · 09/02/2025
For those who can access it, I have posted to the BSRG mailing list a brief response to a few of the points in the IAS President's letter. The letter is quite extraordinary. Over and out.
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Jeff Peakall @hyperpycnal.bsky.social · 09/02/2025
Many of you will have received the letter from the IAS President. The response to our mass resignation as Associate Editors and all the previous resignations is to continue without changing anything one iota. We hope that we have at least shone a light on the workings of the IAS Bureau.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
Have sent the IAS letter and the response I posted to BSRG across. We best get you back on the BSRG list.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
I think you have nailed it there.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
You still on the Imperial email?
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
Yes the website is way out of date as the people who updated it have gone. All CEs, plus Christa have gone plus 12 of the AEs. There are 7 AEs listed here that had already gone. By the end of Monday Elaine will have gone as well. They have hollowed out the entire journal.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
Thanks. Feel free to post it here if you wish. I am still very new here.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
Yes I have just posted a response to parts of it to the BSRG list. Perhaps @seismatters.bsky.social and @bedforms.bsky.social could post that here and elsewhere. It comes as absolutely no surprise that there is no change. This has been the way of it since the Treasurer was appointed.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
More for them to say really, but some more will resign in the near future if things don't change. Others would support a strike, but are not quite ready to resign. A few have not engaged at all and we have not seen them at meetings. Others explorered an interim CE, but that is on the back burner.
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
Thanks Chris
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Jeff Peakall @hyperpycnal.bsky.social · 08/02/2025
We have a resignation letter that we also publicly released via emails. Hopefully a version of this will reach you soon.
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Jeff Peakall @hyperpycnal.bsky.social · 07/02/2025
Following the resignations of all Chief Editors of the journal Sedimentology, I and about 40% of the Associate Editors have also resigned. This has been a very difficult decision for all of us, however we felt that we could not continue. Some AEs have served the journal for decades.
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Jeff Peakall @hyperpycnal.bsky.social · 25/01/2025
Armoured mud clasts are far more important in deep marine systems than we thought, and here we detail the evidence for their transport. Also large buckets filled with multicolour plastic balls...
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Jeff Peakall @hyperpycnal.bsky.social · 17/01/2025
Good spot. Taken in Ulverston, Cumbria, Stan Laurel's birthplace. En route to some rocks of course!
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Jeff Peakall @hyperpycnal.bsky.social · 08/01/2025
Finally made it here from the dark side.
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