iiinova — where your digital self keeps evolving

Jaco H. Baas @makingripples.bsky.social · 02/04/2025

⚒️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)

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Stephen Lokier @lokier.bsky.social · 27/11/2024

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...

Video stills of the heads of selected CaCO3 flows.

(A) 15% low-density turbidity current, (B) 25% low-density turbidity current, (C) 53% high-density turbidity current, (D) 55% high-density turbidity current, (E) 58% mud flow and (F) 59% slide. Dashed lines in (C) and (D) show density interfaces in high-density turbidity currents. Arrow in (E) points to lip region of mud flow. Scale bar is 100 mm long.

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Jaco H. Baas @makingripples.bsky.social · 27/11/2024

@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

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Jaco H. Baas @makingripples.bsky.social · 28/08/2024

@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. .

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Jaco H. Baas @makingripples.bsky.social · 12/07/2024

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.

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Jaco H. Baas @makingripples.bsky.social · 12/07/2024

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.

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Jaco H. Baas @makingripples.bsky.social · 12/07/2024

@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

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Jaco H. Baas @makingripples.bsky.social · 05/04/2024

@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

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Jaco H. Baas @makingripples.bsky.social · 27/03/2024

@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.

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Jaco H. Baas @makingripples.bsky.social · 13/03/2024

@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)

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Joschua Knüppe @joschuaknuppe.bsky.social · 03/03/2024

Result from the Kimmeridge Clay #paleostream!

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Jaco H. Baas @makingripples.bsky.social · 15/02/2024

@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!

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Jaco H. Baas @makingripples.bsky.social · 11/02/2024

@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)

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Sabkha @sabkha.bsky.social · 10/02/2024

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

Picture from the Abu Dhabi sabkha showing a flat surface with a poorly developed polygonal pattern. The edges of polygons are curled upward and inward.

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Henning @geohenning.bsky.social · 10/02/2024

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

Picture showing my shoe on a boulder with wave ripple marks

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Joanna Pszonka @joannapszonka.bsky.social · 07/02/2024

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

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Samuele Papeschi サムエレパペスキ | Geology is the way ⚒️🧪 @calamitaman.bsky.social · 03/02/2024

I reply with a picture of the axial plane crenulations

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Jaco H. Baas @makingripples.bsky.social · 04/02/2024

@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....

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Astrobiology @astrobiology.bsky.social · 01/02/2024

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

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Tim Demko @timdemko.xyz · 02/02/2024

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. 🧪⚒️

Crossbedded? fabric in the 1.7 billion year old Yavapai Schist in central Arizona USA. Boot for scale. Dark and light interlaminated metasandstone with wavy subhorizontal lamina/lamina sets, truncated and downlappping laminae.

Crossbedded ? fabric in the 1.7 billion year old Yavapai Schist in central Arizona USA. Erosion surfaces, wavy, truncated, and down lapping lamina sets, fining-upward ? successions, fine- and coarse-grained interbeds. Boot for scale.

Crossbedded ? metasandstone in the 1.7 billion year old Yavapai Schist in central Arizona USA, with cobble-sized rip-up class, finer- and coarser-grained interbeds, truncated, onlapping and down lapping lamina sets. Boot for scale.

Crossbedded ? metasandstone in the 1.7 billion year old Yavapai Schist in central Arizona USA. Meter-scale hummocky crossbedding with rip-up clasts, truncated lamina, finer- and coarser-grained interbeds. Boot for scale.

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International Association of Sedimentologists @sedimentology.bsky.social · 01/02/2024

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👇

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Samuele Papeschi サムエレパペスキ | Geology is the way ⚒️🧪 @calamitaman.bsky.social · 30/01/2024

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. ⚒️

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International Association of Sedimentologists @sedimentology.bsky.social · 29/01/2024

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

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Ben Miller @extinctmonsters.bsky.social · 26/01/2024

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

Museum display with flat fossils in a case beneath a model of a green, slimy-looking part fish, part salamander.

Close-up of the fossil, showing it's flat, wide head and scaly body.

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Callan Bentley @callanbentley.bsky.social · 27/01/2024

Ice casts in mud.

A dried mud puddle, with many randomly oriented needle shaped indentations. Fingers for scale.

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Michael Anenburg @manenbu.bsky.social · 28/01/2024

Folded rocks, Eden, NSW, Australia ⚒️

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Michael Anenburg @manenbu.bsky.social · 28/01/2024

Nice heavy mineral sedimentation patterns on the beach ⚒️

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Dr Katie Strang @palaeokatie.bsky.social · 24/01/2024

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

Image of a hand holding a light grey coloured, irregularly shaped bit of silty mudstone. On the rock there’s some brown-orange coloured iron oxide staining. Scattered on the rock are pinnules and pinna fossilised seed plants from the Carboniferous. The fossils are composed of a film of carbon and are black in colour, and they contrasts well against the paler grey matrix.

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Jaco H. Baas @makingripples.bsky.social · 23/01/2024

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

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Sapinuwa @sapinuwa.bsky.social · 21/01/2024

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😉)

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British Geological Survey @bgs.ac.uk · 22/01/2024

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...

Argyllshire sheet 84, solid and drift, 1:10 560, 1914. BGS © UKRI

Central Snowdonia sheet 11, solid, 1:25 000, 1972. BGS © UKRI

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Bradly Shelby @bradthecurator.bsky.social · 18/01/2024

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

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H. Pettijohn @punkpaleo.bsky.social · 19/01/2024

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. 🧪

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Jaco H. Baas @makingripples.bsky.social · 19/01/2024

@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.

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Callan Bentley @callanbentley.bsky.social · 17/01/2024

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

Photograph showing some drying mud, with a few thin desiccation cracks making polygonal intersection patterns at ~120 degree angles. But what's really striking, because the image is lit obliquely from the right side, is the several dozen raindrop impression impact craters, many of which show raised rims. Geologist's left hand for scale.

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Derby Geosciences @derbyunigeo.bsky.social · 17/01/2024

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

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Callan Bentley @callanbentley.bsky.social · 16/01/2024

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 ⚒️

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Mindy Weisberger @laminda.bsky.social · 16/01/2024

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 🧪

cnn.com

29 million-year-old grasshopper nest found intact with eggs, study says | CNN

Scientists discovered a fossilized grasshopper egg pod filled with eggs that could be unlike anything paleontologists had ever seen before, according to a new study.

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Jaco H. Baas @makingripples.bsky.social · 08/01/2024

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

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Brian Ricketts @kiwigeolog.bsky.social · 06/01/2024

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

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Jaco H. Baas @makingripples.bsky.social · 05/01/2024

@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)

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Gabriel Ugueto @serpenillus.bsky.social · 03/01/2024

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

Concept studies of Struthiocephalus (top) and Moschops (bottom) in largely 3/4 view. Struthiocephalus is grayish with a reddish head whereas Moschops is dark gray with a pale yellowish rump and posterior legs

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Riley Black 🏳️‍⚧️ 🦕 @restingdinoface.bsky.social · 04/01/2024

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. 🧪

A series of round fossil bones with little points with smaller scutes between them

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Cin-Ty Lee @cintylee.bsky.social · 04/01/2024

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.

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Jaco H. Baas @makingripples.bsky.social · 05/01/2024

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

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Jeanne Timmons @mostlymammoths.bsky.social · 03/01/2024

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/...

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Dr Katie Strang @palaeokatie.bsky.social · 01/01/2024

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 🌿

Portrait photo of a hand holding an irregularly shaped piece of fine grained grey coloured sandstone. In the bottom centre is a single pinna from a seed-plant (eusphenopteris sp.). The pinna are bipartite and pinnules have oval lobes. The fossil plant is black because it retains some of the original carbon and it contrasts well against the light grey matrix.

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Jaco H. Baas @makingripples.bsky.social · 02/01/2024

@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.

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