⚒️NEW PAPER ALERT: Softgrounds: substrates controlled by sediment gravity flows and the evolution of deep-water trace fossils With Yuxuan Wang, Paul Wignall, Jeff Peakall & Simon Poulton (forthcoming GeolSoc SP)

Our new paper.... "Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?" led by @makingripples.bsky.social along with William Hewitt & James Hendry is out now as #OpenAccess in The Depositional Record. Enjoy! doi.org/10.1002/dep2...

@earth-science.bsky.social ⚒️NEW PAPER ALERT: "Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?" with @lokier.bsky.social @bangoruniversity.bsky.social

@earth-science.bsky.social ⚒️ Dear @sedimentology.bsky.social student members, I encourage you to apply for the 11th International Summer School of Sedimentology, held on July 4-12, 2025, in Wales and hosted by @makingripples.bsky.social, Meg Baker, Dei Huws & @lokier.bsky.social. .

NEW PAPER ALERT: Silt matters in sandy bedform dynamics! Led by Sjoukje de Lange and soon to be published in AGU's Water Resources Research.

NEW PAPER ALERT: Continuing the reinvention of sole marks, and extending their use beyond palaeoflow reconstruction. Led by Jeff Peakall and soon out in the journal Sedimentology.

@earth-science.bsky.social NEW PAPER ALERT: How does sediment gravity flow mobility vary for mixtures of weakly & strongly cohesive clay types? Counterintuitively, adding small amounts of strongly cohesive clay enhances mobility... Led by the amazing Megan Baker and to be published in AGU monograph

@earth-science.bsky.social New paper submitted: An extension of a classical method for predicting water-surface wave properties from wave ripples in the geological record. Led by Jonathan Malarkey.⚒️🌊 @jsedimentology.bsky.social

@earth-science.bsky.social ⚒️ Some places left for ECRs, but be quick! Price reduced to £156 p/p, following generous sponsoring from the International Association of Sedimentologists.

@earth-science.bsky.social ⚒️ New paper alert: Marine redox dynamics and biotic response to the mid-Silurian Ireviken Extinction Event in a mid-shelf setting, led by Yuxuan Wang (Leeds)

Result from the Kimmeridge Clay #paleostream!

@earth-science.bsky.social ⚒️ New manuscript submitted: "Integrating transitional-flow signatures into hybrid event beds: Implications for hybrid-flow evolution on a submarine lobe fringe", led by Piotr Łapcik (Krakow, Poland). An extended facies model for hybrid event beds!

@earth-science.bsky.social Part 2 of what MS Bing AI picture creator makes of "deep-marine turbidity current". It is getting worse! (left: 2 months ago, right: today)

Desiccation polygons in thin microbial mats. As mats dehydrate and contract, the edges of polygons roll inwards to produce characteristic open dishes. These edges are particularly susceptible to erosion and transport - acting to ‘seed’ new mats if deposited in a suitable environment. #SabkhaSaturday

A boulder at the playground with some very nice wave ripple marks. ⚒️ #UrbanGeology

If you are a MSc or PhD Student working on volcanic processes in the sedimentary record, I encourage you to present your results during the 9th @sedsonline.bsky.social Student Webinar that is held on 24th April. Recruitment is open by 15th March: docs.google.com/forms/d/e/1F... #Seds_Online

I reply with a picture of the axial plane crenulations

@earth-science.bsky.social ⚒️ New publication alert: Manning, Chassagne & Parsons - Cohesive Sedimentary System: Dynamics and Deposits A great collection of papers on 'sticky' sediment. Free to download: www.frontiersin.org/research-top....

Source Rocks Of Earth's First Real Continents Have Been Uncovered astrobiology.com/2024/02/sour... #astrobiology #exoplanet #geology

Outcrop of metasandstone in the 1.7 billion year old Yavapai Schist in central Arizona USA that has some intriguing relict sedimentary structures, including trough and hummocky cross-stratification and cobble-sized rip-up clasts. The huge hummocky crossbeds, with rip-ups, could be a tsunamite. 🧪⚒️

The BSRG Aberystwyth Fieldtrip focuses on the latest insights in submarine gravity flow research, and is open to post/graduate students and Early Career Researchers from the UK and across Europe👇

A tiny wee chloritoid star from the highest-grade rocks in the Northern Apennines (but still low grade), the Massa Unit: home of the very rare chloritoid + kyanite assemblage. ⚒️

New Sedimentology (Volume 71/Issue 2, February 2024) is now available: onlinelibrary.wiley.com/toc/13653091...

Here's Elpistostege, a transitional "fishopod" with wrists and the ability to do pushups. Life-size model by Tyler Keillor, naturally. #FossilFriday 🧪⚒️

Ice casts in mud.

Folded rocks, Eden, NSW, Australia ⚒️

Nice heavy mineral sedimentation patterns on the beach ⚒️

Here’s some wee 315 million year old seed plants (neuropteris) from the Scottish Coal Measures of Fife 🖤🏴󠁧󠁢󠁳󠁣󠁴󠁿

Please provide a short, one-page CV. OK then ...

I am on duty today, and I was busy preparing a presentation since the morning. Guess what is it about? Urban geology!😆🐚 Er, does anyone know a paleontological conchologist over here? I might have one or two questions.😆 (Yes these are my fingers & feet😉)

As part of our continuous effort to provide more open access to our data, BGS has launched the updated BGS Maps Portal, which includes 10 000 and 1:10 560 scale maps. The portal provides access to over 45 000 BGS maps. webapps.bgs.ac.uk/data/MapsPor...

Dinosaur National Monument contains over 1500 fossils from 11 different species of dinosaurs- and something of a mystery. Despite the immense number of bones preserved here, only a single specimen shows signs of having been gnawed by a predator. #paleontology #dinosaurs #scicomm #paleosky

It's Fossil Friday! This is the holotype skull of Diabloceratops, discovered in the Wahweap Formation. While its horns may have been for identifying other members of its species, they could have served as protection against its contemporary tyrannosaurid, Lythronax. 🧪

@earth-science.bsky.social I probably won't cite these in any papers soon, but these old geology books (remember books?!) are a nice addition to my bookshelf.

Raindrop impressions - a primary sedimentary structure that resembles a small-scale version of the lunar surface, especially when lit obliquely like this. ⚒️

We are currently looking for a Senior Lecturer in Earth Sciences with a specialisation in reservoir modelling. Full details here: www.derby.ac.uk/jobs/current... Closing date: Sunday 11 February 2024

A chondrite meteorite. The little circles are chondrules, rock vapor condensate grains - like space ooids; the oldest objects in our solar system. Chondrites are cosmic dust bunnies, as the chondrules glommed onto each other via static cling. #spaceooids ⚒️

Some fossils make you go WHOA at first sight and this is one of them: an ancient grasshopper nest with 50 intact eggs. It's the first fossil grasshopper nest ever found! Discovered at John Day Fossil Beds National Monument in Oregon, it offers a peek at insect reproduction 29 million years ago 🧪

@earth-science.bsky.social ⚒️ Graded conglomerate-sandstone, Ordovician, Anglesey, Wales, UK. Are the gravel clasts imbricated?

Another post on paleontology for sedimentologists (and anyone else) - basically undergrad level identification. This one on corals. Lots of photos here courtesy of @annettelokier.bsky.social U. Derby ⚒️🧪 #geosciences www.geological-digressions.com/coral-morpho... Image credits in the post text

@earth-science.bsky.social ⚒️ New manuscript submitted: "Fine sediment in mixed sand-silt environments impacts bedform geometry by altering sediment mobility", led by Sjoukje de Lange (Univ. Wageningen)

The first time that synapsids tried evolving tanks: Tapinocephalians. Studies of Struthiocephalus (top) and Moschops (bottom) from Permian Africa 🐡 🎨 🧪 #paleontology

A bony mosaic. These are osteoderms that covered the back of the ankylosaur Sauropelta. Even though such bones are often referred to as “body armor,” they were probably important for display, regulating body temperature, and calcium storage, too. 🧪

Lawsonite-bearing blueschist facies pillow basalt from Dana Point, CA. Much of the basaltic crust does not become sheared as exemplified by the amazing preservation of original structures here. Shear deformation must be highly localized in subduction zones.

@earth-science.bsky.social ⚒️ Proximal submarine channel fill in the deep-marine Aberystwyth Grits Group (Silurian, Cwmtydu, West Wales, UK)

Macroflora from Lower Jurassic (Pliensbachian) of Hicks Creek, southern Talkeetna Mountains, south-central #Alaska Maria Barbacka et al #paleontology #palaeontology 🧪⚒️ #paleobotany #palaeobotany #PlantScience onlinelibrary.wiley.com/doi/10.1002/...

Happy New Year everyone 🎉 Instead of a lump of coal, here’s a wee 320 million year old pinna from an extinct seed-plant (eusphenopterid) that once flourished in Scotland’s tropical coal swamps 🌿

@earth-science.bsky.social ⚒️ Fluid-induced Interfacial Deformation Structures (FIDs) on mud ripples (shown on lower bed surfaces). Yellow arrows point in palaeoflow direction. Source: manuscript in review prepared by Peakall, Best, Baas, Wignall, Hodgson & Łapcik.