Jesse ‘Πέτρος’ Walters
@thegeojesse.bsky.social
Assistant Prof @UniGraz in Austria. Subduction, redox, geochron & metamorphism. He/Him/His.
Pinned
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
The open-access paper is here: lnkd.in/eB4im8dh
MinPlotX can be downloaded here: lnkd.in/eXMHtkkK
#geology #petrology #minerals
Reposted by Jesse ‘Πέτρος’ Walters
U-Pb garnet geochronology is a great technique for dating metamorphic and igneous rocks, but garnets have very low U and Pb. Sometimes we might be dating the inclusions instead. It is not always clear what is and is not an inclusion!
See the paper here: lnkd.in/gGriU_Fv
#geology #geochronology
See the paper here: lnkd.in/gGriU_Fv
#geology #geochronology
August 12, 2025 at 1:17 PM
U-Pb garnet geochronology is a great technique for dating metamorphic and igneous rocks, but garnets have very low U and Pb. Sometimes we might be dating the inclusions instead. It is not always clear what is and is not an inclusion!
See the paper here: lnkd.in/gGriU_Fv
#geology #geochronology
See the paper here: lnkd.in/gGriU_Fv
#geology #geochronology
Reposted by 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
Weather Obs started very early here, Maria Theresa was still alive.
#showyourstripes #climateaction
June 21, 2025 at 8:56 AM
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
Weather Obs started very early here, Maria Theresa was still alive.
#showyourstripes #climateaction
Reposted by Jesse ‘Πέτρος’ Walters
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...
There Might Not Be a Map for That: Budget Cuts Threaten Geological Surveys
www.nytimes.com
June 20, 2025 at 3:12 PM
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...
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
The open-access paper is here: lnkd.in/eB4im8dh
MinPlotX can be downloaded here: lnkd.in/eXMHtkkK
#geology #petrology #minerals
February 22, 2025 at 5:34 PM
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
The open-access paper is here: lnkd.in/eB4im8dh
MinPlotX can be downloaded here: lnkd.in/eXMHtkkK
#geology #petrology #minerals
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
January 20, 2025 at 2:56 PM
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
Reposted by Jesse ‘Πέτρος’ Walters
The Earth is undergoing rapid unscheduled warming.
January 17, 2025 at 3:28 PM
The Earth is undergoing rapid unscheduled warming.
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
January 3, 2025 at 6:58 PM
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
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
#geology #metamorphic #rocks #minerals #science
December 4, 2024 at 11:42 AM
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
#geology #metamorphic #rocks #minerals #science
Reposted by Jesse ‘Πέτρος’ Walters
Mapping changes in temperature every year (1850-2023)
Each year has a different pattern of temperature variations but the trends are clear and stark
Each year has a different pattern of temperature variations but the trends are clear and stark
November 17, 2024 at 3:37 PM
Mapping changes in temperature every year (1850-2023)
Each year has a different pattern of temperature variations but the trends are clear and stark
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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April 22, 2024 at 7:36 PM
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...
⚒️⚛️🔬🧪
⚒️⚛️🔬🧪
Reposted by Jesse ‘Πέτρος’ Walters
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...
New paper with @thegeojesse.bsky.social out in Contributions to Mineralogy and Petrology, open access at doi.org/10.1007/s004...
April 9, 2024 at 10:01 AM
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...
New paper with @thegeojesse.bsky.social out in Contributions to Mineralogy and Petrology, open access at doi.org/10.1007/s004...
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. ⚒️🧪🔬⚛️
March 23, 2024 at 9:36 AM
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. ⚒️🧪🔬⚛️
Reposted by Jesse ‘Πέτρος’ Walters
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.
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.
www.npr.org
March 9, 2024 at 6:20 PM
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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March 6, 2024 at 5:44 PM
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/ ⚒️🧪🌎
February 22, 2024 at 4:23 PM
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/ ⚒️🧪🌎
Reposted by Jesse ‘Πέτρος’ Walters
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/
Support QUARTETnary for as little as €1 and help us bring science to the table! 🦕🌱🌎https://www.kickstarter.com/projects/irisvanzelst/quartetnary/
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!
www.kickstarter.com
February 20, 2024 at 10:02 AM
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/
Support QUARTETnary for as little as €1 and help us bring science to the table! 🦕🌱🌎https://www.kickstarter.com/projects/irisvanzelst/quartetnary/
Reposted by Jesse ‘Πέτρος’ Walters
In western Canada, the wildfire “season” has become the whole year, as over a hundred fires from 2023 continue to smolder, many of them underground.
www.cbc.ca/news/canada/...
www.cbc.ca/news/canada/...
February 21, 2024 at 1:16 PM
In western Canada, the wildfire “season” has become the whole year, as over a hundred fires from 2023 continue to smolder, many of them underground.
www.cbc.ca/news/canada/...
www.cbc.ca/news/canada/...
Reposted by Jesse ‘Πέτρος’ Walters
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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January 30, 2024 at 9:07 PM
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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Fantastic USGS map of all of the natural waterfalls in the USA. How many does your state have? Proud to be from Washington state, which tops the chart with a total of 2907 waterfalls! ⚒️
January 15, 2024 at 2:24 PM
Fantastic USGS map of all of the natural waterfalls in the USA. How many does your state have? Proud to be from Washington state, which tops the chart with a total of 2907 waterfalls! ⚒️
Reposted by Jesse ‘Πέτρος’ Walters
Iceland's daily paper 'Morgunblaðið' has this incredible front page photo today. 🌋⚒️ #IcelandEruption
January 15, 2024 at 7:47 AM
Iceland's daily paper 'Morgunblaðið' has this incredible front page photo today. 🌋⚒️ #IcelandEruption
These poor garnets have been through a lot! Sliced and sheared to bit on their journey in an ancient subduction zone. Maybe they will tell us about what happened to them? Fingers crossed! ⚒️
November 2, 2023 at 9:19 PM
These poor garnets have been through a lot! Sliced and sheared to bit on their journey in an ancient subduction zone. Maybe they will tell us about what happened to them? Fingers crossed! ⚒️
Reposted by Jesse ‘Πέτρος’ Walters
Some very sexy folds in flysch deposits (sandstone and shale layers) to let you start your Monday better! ⚒️
⛏ Macigno sandstone
🕑 Oligocene - Lower Miocene
🧭 Vernazza, Cinque Terre, Italy
⛏ Macigno sandstone
🕑 Oligocene - Lower Miocene
🧭 Vernazza, Cinque Terre, Italy
October 30, 2023 at 11:56 AM
Some very sexy folds in flysch deposits (sandstone and shale layers) to let you start your Monday better! ⚒️
⛏ Macigno sandstone
🕑 Oligocene - Lower Miocene
🧭 Vernazza, Cinque Terre, Italy
⛏ Macigno sandstone
🕑 Oligocene - Lower Miocene
🧭 Vernazza, Cinque Terre, Italy
Reposted by Jesse ‘Πέτρος’ Walters
Bluesky tip: post a 🧪to get picked up on science feeds and a ⚒️ for geoscience
October 29, 2023 at 9:53 PM
Bluesky tip: post a 🧪to get picked up on science feeds and a ⚒️ for geoscience