iiinova — where your digital self keeps evolving

Reposted by Edward W. Marshall

Barbara Kleine-Marshall @barbaraikm.bsky.social · 09/03/2026

We are looking for 6 motivated Postdocs interested in various aspects of Earth system sciences. More information here: fau-earth-system-science.github.io #geochemistry

fau-earth-system-science.github.io

Earth System Research and Training at FAU

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Edward W. Marshall @edmarshall.bsky.social · 26/02/2026

I don't wanna sound too critical here. Its a super cool study. Ive never heard of this kind of iterative method before. But in places the paper seems to dismiss the relevance of any other lithologies in incipient melting. Im not so convinced that CO2 in the mantle only resides in fertile peridotite.

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Edward W. Marshall @edmarshall.bsky.social · 26/02/2026

If I understand correctly, they basically identify the composition of incipient melt of a very volatile enriched KLB-1 to be kimberlitic. So, what happens if they use other peridotite/pyroxenite compositions? Or what happens if the system isnt very enriched in volatiles?

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Edward W. Marshall @edmarshall.bsky.social · 14/01/2026

Hiring a new professor in my department who specializes in Earth surface topics (e.g. climate, sediments, soils, oceans, etc). Non-germans welcome to apply-- the postdoctoral qualifications (e.g. habilitation) are just for German applicants.

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Reposted by Edward W. Marshall

Barbara Kleine-Marshall @barbaraikm.bsky.social · 28/11/2025

Come and measure your samples with our LA triple quadrupole ICP-MS! Our analyses: -trace elements in a wide range of geomaterials -S isotopes in sulfides -element mapping -U/Pb geochronology (coming soon!) -and more... www.gzn.nat.fau.eu/geochemistry-and-ore-deposits-2/la-icp-ms-laboratory/

gzn.nat.fau.eu

Geochemistry and ore deposits

The working group Geochemistry and ore deposits focuses on the fundamentals of element enrichment and depletion upon fluid transport and fluid-rock interaction in the Earth’s crust.

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Reposted by Edward W. Marshall

EAG @eageo.bsky.social · 26/11/2025

Job alert: #postdoc in experimental Petrology/ Geochemistry, University of Innsbruck (AT). Apply by 11 January 2026 or position open until filled. More info: buff.ly/2A7JsJN

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Reposted by Edward W. Marshall

Barbara Kleine-Marshall @barbaraikm.bsky.social · 27/09/2025

New publication out on the interaction of seawater with oceanic crust! 🌊 🪨 We show how temperature, reaction progress, time and crystallinity of the crust affect elemental fluxes! www.sciencedirect.com/science/arti...

sciencedirect.com

Modeling seawater-basalt interaction at 10–100 °C: Controlling parameters and effects on the composition of the oceanic crust and seawater

Chemical reactions and element mobilization during seawater-basalt interaction play a central role in regulating global element fluxes between seawate…

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Reposted by Edward W. Marshall

Dawid Szymanowski @dawid.eurosky.social · 04/09/2025

Happy to share the long-awaited results of our community experiment comparing high-precision ID-TIMS U-Pb lab performance🧪⚒️ We do pretty well but as ever there is room for improvement 🤓 Stay tuned! doi.org/10.5194/gchr...

doi.org

Interlaboratory reproducibility of ID-TIMS U–Pb geochronology evaluated with a pre-spiked natural zircon solution

Abstract. The highest precision and accuracy in U–Pb geochronology is achieved using isotope dilution thermal ionisation mass spectrometry (ID-TIMS), a technique which owes its reliability to precise ...

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Edward W. Marshall @edmarshall.bsky.social · 29/08/2025

Oh I see! Yeah you are right-- it does make it seem like those types don't exist. I actually remember being confused about this when I was a student.

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Edward W. Marshall @edmarshall.bsky.social · 29/08/2025

It is? I thought it was called tachylite. I thought true obsidian was always silicic. In my head the Venn diagram would have a big circle for volcanic glass with tachylite and obsidian as non-overlapping circles within the volcanic glass circle.

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Edward W. Marshall @edmarshall.bsky.social · 29/08/2025

I guess they are writing to integrate the text better with rocks that students likely have in their classroom or might be familiar with prior to the class. They are putting in the ladder at the shallow end of the pool.

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Edward W. Marshall @edmarshall.bsky.social · 13/08/2025

I should say-- the one cartoon figure, not figures. Anyway, definitely not as depicted-- the core-mantle boundary being stretched to the surface.

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Edward W. Marshall @edmarshall.bsky.social · 13/08/2025

The title of the artcle and the figures of the article are misleading. The core isn't leaking out at the surface. Tiny fractions of core material are entrained into the mantle, and this core-contaminated mantle material eventually is melted beneath some hot spots.

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Edward W. Marshall @edmarshall.bsky.social · 31/07/2025

What are these? Are they glomercrysts weathering out of a lava?

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Edward W. Marshall @edmarshall.bsky.social · 25/07/2025

@vaccinium-sultan.bsky.social is always posting awesome xenoliths. They aren't folds or thin sections, but they are rocks!

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Edward W. Marshall @edmarshall.bsky.social · 03/06/2025

Amazing work by @albertocaracciolo.bsky.social . It's the coolest diffusion timescale work I've ever seen. You can see each eruption priming and how they are related to one another. Just super cool science.

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Reposted by Edward W. Marshall

Alberto Caracciolo @albertocaracciolo.bsky.social · 03/06/2025

🚨🌋New paper on the geochemistry and petrology of the 2022–23 Fagradalsfjall eruptions on the Reykjanes Peninsula, Iceland. We study temporal variations in the magmatic plumbing system and link diffusion timescales to monitoring signals, tracing the timing of mush disaggregation and dike propagation

academic.oup.com

Mush disaggregation and dike propagation timescales at active volcanoes – Evidence from the 2022-2023 Fagradalsfjall eruptions

Abstract. The architectures of magma plumbing systems and timescales of magmatic processes are fundamental to understanding volcanic eruption dynamics. Thi

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Edward W. Marshall @edmarshall.bsky.social · 31/05/2025

Hmm tricky! I tried to think of relatively recent and/or short papers.

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Reposted by Edward W. Marshall

Dr. Jennifer Wade @volcanojw.bsky.social · 31/05/2025

This proposed budget is a policy statement, not an appropriation. There are still a lot of steps and potential changes ahead before it becomes one. This is not a time to sit quietly, team. Let's go.

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Edward W. Marshall @edmarshall.bsky.social · 29/05/2025

This was written about media content, but the same can be said for scientific content. When the incentive structure is based around numbers of papers and numbers of citations, it's a system that assumes quantity means quality. It's ripe for abuse by AI, which can do quantity really well...

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Edward W. Marshall @edmarshall.bsky.social · 27/05/2025

Thanks! It was by far the most exciting science I've ever done! It's true that the earliest lavas are buried- maybe we should be drilling and collecting core from more lava shields! The cores from the HSDP borehole were super cool and revealing, for example.

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Edward W. Marshall @edmarshall.bsky.social · 22/05/2025

I don't think it's your fault. I think the article has quite a bit of spin. I just hope the court cases go through and money gets eventually spent.

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Edward W. Marshall @edmarshall.bsky.social · 22/05/2025

I think the data is the amount of funding allocated by the NSF from Jan-May from 2025 compared to previous years. The article is written like there are actual budget cuts, but the reality is that NSF is at a standstill due to chaos and illegal impoundment. The budget could still spent eventually?

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Reposted by Edward W. Marshall

Dr Val Finlayson @justsomeisotope.bsky.social · 30/04/2025

New paper out by my team, led originally by the late Jasper Konter, an amazing human being and scientist, and with important contributions from the late Paul Wessel, both of whom we lost during review. The whole team stepped up to get this paper to the finish line. www.nature.com/articles/s41...

nature.com

Pacific hotspots reveal a Louisville–Ontong Java Nui tectonic link - Nature

Geochemistry and geochronology show that Samoa and Rurutu–Arago are the longest-lived Pacific hotspots, providing better constraints on plate rotation and support for a link between the Louisville vol...

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Reposted by Edward W. Marshall

Alondra Nelson @alondra.bsky.social · 24/03/2025

Former Columbia provost Jonathan Cole-"Columbia’s leaders have weakened...our leadership among the greatest educational institutions in the world...If we don’t resist collectively by all legal means...we are apt to see the destruction of our most revered institutions” www.nytimes.com/2025/03/24/o...

nytimes.com

Opinion | Universities Gave Us the iPhone, the Jet Engine and Gatorade. We’re Tossing That Away.

The postwar compact on research that powered America’s economic and military dominance is under threat.

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Edward W. Marshall @edmarshall.bsky.social · 13/03/2025

Phew--- looks like the earthquake swarm at the tip of the Reykjanes sputtered out. An eruption there would come straight through the geothermal field and power plant there, so it would be devastating! Although magma injection is probably good for the longevity of the geothermal reservoir!

An earthquake map of the Reykjanes peninsula. A bar on the bottom shows earthquakes over time. The earthquake swarm suddenly stopped about 5 hours ago.

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Edward W. Marshall @edmarshall.bsky.social · 13/03/2025

I don't think anyone has observed ground deformation yet. The gps stations don't show much movement.

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Edward W. Marshall @edmarshall.bsky.social · 13/03/2025

The quick and dirty way is to delete the s out of https before the url. That's how I usually get on brunnur

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Edward W. Marshall @edmarshall.bsky.social · 27/02/2025

As of now, we've had very few applicants. So chances are very good of getting a position! However, the deadline is March 7th, so act fast!!!!

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Edward W. Marshall @edmarshall.bsky.social · 27/02/2025

Not European? Good! This actually makes it EASIER to apply. To foster international collaboration, they prevent people from applying to work on a PhD project in their country of residency. If you are from the US, this means you can apply to any of the projects!

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Edward W. Marshall @edmarshall.bsky.social · 27/02/2025

Are a geoscience student in the US thinking about a PhD, but feeling pessimistic about the future of US science? Come to Europe! We have 18 fully funded (and unfilled) PhD positions-- all related to fluid related processes within the Earth. Find out more & apply: formovfluid.eu/phd-positions/

formovfluid.eu

FormovFluid

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Reposted by Edward W. Marshall

Dr. Julian Lozos @seismogenic.bsky.social · 22/02/2025

⚒️🧪 Today's Icelandic Met Office update says that the likelihood of another eruption increases as more time passes, since magma is still accumulating below. There's also a neat detailed map of the eruption start points and fissures from all 7 Sundhnúksgígar eruptions so far. vedur.is/um-vi/fretti...

A map of part of the Reykjanes Peninsula, Iceland, with the town of Grindavík toward the lower left corner.
Gray lines mark lava barriers and black lines show roads - but a series of colored lines angling from lower left to upper right indicate the eruptive fissures from the seven eruptions along the Sundhnúksgígar crater row since December of 2023. The starting points of the eruptions are marked with stars, and with the exception of the January 2024 eruption (which started much further south), are clustered within 1 km of each other. The fissures at the center of the zone are also close together, but they parallel or cross each other, rather than completely overlapping.
The areas shaded light gray on this map show ground that has been covered with new lava since December of 2023. It's most of the map.

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Edward W. Marshall @edmarshall.bsky.social · 15/02/2025

Is that really a lava flow going on snow? Not a vent? Maybe on a very thick ice field? This hasn't happened in Iceland during the recent eruptions, but the snow was never more than 20cm or so.

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Edward W. Marshall @edmarshall.bsky.social · 10/02/2025

Damn, ok AGU. In the past few years it's seemed like AGU has really become more like a corporate entity that has a captive customer base and not a 501c3 that represents geoscientists. I guess this is more of that.

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Edward W. Marshall @edmarshall.bsky.social · 05/02/2025

...I substituted "ardor" which in latin means burning light or heat (or passion, lol) as a latiny way to describe laser ablation. So Mente et Adore means "by reason and burning light" or "by reason and laser ablation", or "by reason and firey passion".

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Edward W. Marshall @edmarshall.bsky.social · 05/02/2025

Woohoo! The website is up! I had good fun coming up with the lab motto- "mente et ardore". It's a take on the classic geology motto "mente et malleo" which means "by reason and hammer", but since it's a laser lab...

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Reposted by Edward W. Marshall

Oliver Lamb @olamb245.bsky.social · 03/02/2025

GNS Science is hiring! We are looking for someone to join our team as an InSAR Scientist (17 Feb. deadline): nzcris.wd3.myworkdayjobs.com/en-US/nzcris... Or as a Senior Environmental Geochemist (24 Feb. deadline): nzcris.wd3.myworkdayjobs.com/en-US/nzcris...

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