Jesse ‘Πέτρος’ Walters

The alps have warmed extremely - as can be seen here in the data from #Innsbruck. Warm years are dominant since the 90s, cold years disappear. Massive glacier melting is only one consequence.

Weather Obs started very early here, Maria Theresa was still alive.

#showyourstripes #climateaction

There Might Not Be a Map for That: Budget Cuts Threaten Geological Surveys

Nice to get to talk to the New York Times @nytimes.com about funding challenges around publicly available precompetitive geoscience data acquisitions and geological mapping right when these data are more vital than ever for national and economic security: www.nytimes.com/2025/06/20/c...

thanks!

Thanks! There are a lot of different plotting options. I need to make some instructional videos.

Announcing MinPlotX, an open-source software for mineral formula recalculation and compositional plotting with an easy-to-use stand-alone graphical user interface.
The open-access paper is here: lnkd.in/eB4im8dh
MinPlotX can be downloaded here: lnkd.in/eXMHtkkK
#geology #petrology #minerals

Very interesting! Maybe the result of mantle metasomatism? I guess I just wasn't lucky enough!

Where in Norway? I looked for olivine in Almklovdalen, but I didn't find anything like that! This looks to me like the larger more gemmy crystals you get in metasomatized carbonate rocks instead of ultramafics.

Wow, where is that from?

AGC is now open for submissions! I am excited to be a handling editor of this new community-lead diamond open access journal. I look forward to seeing your submissions! Check out the webpage for more information: journals.uu.se/AGC/index

Line graph showing global surface temperature records from 1850 to 2024, compared across various datasets: NASA, Hadley/UEA, NOAA, Berkeley, and Copernicus ERA5. The y-axis indicates temperature deviations relative to the 1850-1900 average.

The Earth is undergoing rapid unscheduled warming.

Finally some #geology on The Late Show. If he can remember that cummingtonite is in the monoclinic crystal system so can you!

Wasn't the implementation blocked by a federal judge?

Of course most of the lecture reviews papers by @fredgaidies.bsky.social

First lecture of 2025 prepared! How do minerals grow and rocks form? Seems like a very basic question in geology, given how much of the science is build on the prerequisite of rocks existing in nature, but the answer is complex. #petrology #metamorphism #kinetics #thermodynamics

Oh this sounds interesting.

I agree. I am lucky that Bob let me work on such a cool story with him. He's published a lot on pressure solution in shear zones going back to the 80s. We are also working on some interesting aspects of activity gradients and disequilibrium mineral preservation in these rocks.

In the above image you can see that the muscovite in the kink band contains lower Na and higher Mg compared to the, consistent with selective dissolution and reprecipitation within this high strain zone.

New paper alert! Micas and chlorite show progressive recrystallization in a retrograde shear zone, demonstrating that pressure solution is the dominant deformation mechanism (followed by grain boundary sliding). Check it out here lnkd.in/gCqMxaJB

#geology #metamorphic #rocks #minerals #science

Why are grant proposals always due at the worst times? In the US they are right after New Years, for the ERC grants they are at the beginning of the teaching term. It's like they want to torture us.

Thanks! The new influx of people was definitely an inspiration. For a while there it wasn't clear where or if people would migrate to another platform.

174 tiny maps showing temperature variations

Mapping changes in temperature every year (1850-2023)

Each year has a different pattern of temperature variations but the trends are clear and stark

U-Pb garnet geochronology reveals a 400 million year evolution of the lower crust, including multiple periods of ultrahigh temperature metamorphism! Check it out: link.springer.com/article/10.1...
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Do you have silicates in or around your carbonatites? Maybe you have an antiskarn!

New paper with @thegeojesse.bsky.social out in Contributions to Mineralogy and Petrology, open access at doi.org/10.1007/s004...

Thank you!

Thank you!

I will start in July as an Assistant Professor of Petrochronology at the University of Graz, Austria. Looking forward to new research opportunities and the chance to grow as an educator. Keep an eye on this space as I will advertise a PhD position soon. ⚒️🧪🔬⚛️

U.S. has warmest winter on record – and no, that's not a good thing From lack of snow to wildfires, a record-warm winter had impacts across the country. Scientists say winters are warming faster than any other season in the U.S.

The lower 48 states just had the warmest winter in 130 years of record-keeping, according to the National Oceanic and Atmospheric Administration. Temperatures were more than 5 degrees Fahrenheit hotter than average.

Interested in subduction zones and volatiles? Consider submitting to our session at EMC 2024 in Dublin. Abstracts are due on March 22nd: emc-2024.org/abstract-sub...

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Thinking of attending EMC24 in Dublin? Consider submitting an abstract to our session in honor of Ed Grew! Abstracts submission (22 March deadline) & registration here: emc-2024.org/registration/ ⚒️🧪🌎

QUARTETnary - The card game about the geological time scale Discover the history of the Earth by collecting mountains, animals, and plants to complete your time scale!

We are LIVE on #Kickstarter. I repeat, we are LIVE! This is not a drill!

Support QUARTETnary for as little as €1 and help us bring science to the table! 🦕🌱🌎https://www.kickstarter.com/projects/irisvanzelst/quartetnary/