Jeff Peakall

Jeff Peakall

@hyperpycnal.bsky.social

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

206 followers121 following40 posts

Jeff Peakall
@hyperpycnal.bsky.social

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.comLearning From Crushing Failures: Changes in Physical Properties Reveal the Mechanics of Submarine Carbonate LandslidesChanges 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...

Jeff Peakall reposted

Duncan McIlroy
@dmcediacaran.bsky.social

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...

Jeff Peakall
@hyperpycnal.bsky.social

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!

Duncan McIlroy@dmcediacaran.bsky.social

kwnsfk27.r.eu-west-1.awstrack.me/L0/https:%2F... A great first collaboration with Jeff Peakall @hyperpycnal.bsky.social whose work anyone looking at enigmatic bedding plane structures would be well advised to look up :-)

Jeff Peakall
@hyperpycnal.bsky.social

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.

Jeff Peakall
@hyperpycnal.bsky.social

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!!!

Jeff Peakall
@hyperpycnal.bsky.social

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.comDepositional and Erosional Behaviour of Cohesive Sediments in Estuarine Saltmarsh and Mudflat EnvironmentsManagement 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...
Jeff Peakall
@hyperpycnal.bsky.social

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.comRevisiting the black shale depositional enigma: Transport processes and contrasting sediment sources in a heterolithic basin fill – Bowland Basin, EnglandFactors 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 ....
Jeff Peakall
@hyperpycnal.bsky.social

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.comEditors 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…
Jeff Peakall
@hyperpycnal.bsky.social

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

Jeff Peakall
@hyperpycnal.bsky.social

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.

Jeff Peakall
@hyperpycnal.bsky.social

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.

Jeff Peakall
@hyperpycnal.bsky.social

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.

Jeff Peakall
@hyperpycnal.bsky.social

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...

International Association of Sedimentologists@sedimentology.bsky.social

#WeekendReading with The Depositional Record: Preservation of groove mark striae formed by armoured mud clasts: The role of armour sediment size and bed yield stress doi.org/10.1002/dep2...

doi.orgPreservation of groove mark striae formed by armoured mud clasts: The role of armour sediment size and bed yield stressExperiments simulating the formation of striated grooves by armoured mud clasts carried at the base of quasi-laminar and fully laminar debris flows reveal that tools with small-diameter silt and sand...

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