Etienne Médard
@etiennemedard.bsky.social
Earth and planetary scientist (igneous petrology / volcanology) and nature enthusiast - Associate Prof @UCAuvergne - Views are my own.
@erikklemetti.bsky.social @olamb245.bsky.social looks like there is indeed a lower part of the plume that moved to a different direction
The moment of the eruption of Hayli Gubbi (the first time in at least 10,000 years) as seen from ground level.
November 23, 2025 at 10:40 PM
@erikklemetti.bsky.social @olamb245.bsky.social looks like there is indeed a lower part of the plume that moved to a different direction
Reposted by Etienne Médard
Do you like stripy rocks? Want to study how ore deposits form? Does fieldwork in Norway sound like fun? Come do a PhD with @3oja.bsky.social and me (and a few others) at @ueaenv.bsky.social!
aries-dtp.ac.uk/studentships...
aries-dtp.ac.uk/studentships...
Magma emplacement and its evolution: deciphering between magmatic and tectonic processes | Aries
Dr Zoja Vukmanovic, School of Environmental Sciences, University of East Anglia Dr Gareth Fabbro, School of Environmental Sciences, University of East Anglia Dr Will McCarthy, University of St Andrews...
aries-dtp.ac.uk
October 20, 2025 at 4:30 PM
Do you like stripy rocks? Want to study how ore deposits form? Does fieldwork in Norway sound like fun? Come do a PhD with @3oja.bsky.social and me (and a few others) at @ueaenv.bsky.social!
aries-dtp.ac.uk/studentships...
aries-dtp.ac.uk/studentships...
October 13, 2025 at 8:59 PM
Reposted by Etienne Médard
▶️ Les équipes du REVOSIMA étaient présentes ce matin, place de la république à Mamoudzou, pour la journée nationale de la résilience. L'occasion pour la population de s'acculturer aux risques et plus particulièrement aux risques volcaniques et sismiques 🌋.
October 5, 2025 at 9:38 AM
▶️ Les équipes du REVOSIMA étaient présentes ce matin, place de la république à Mamoudzou, pour la journée nationale de la résilience. L'occasion pour la population de s'acculturer aux risques et plus particulièrement aux risques volcaniques et sismiques 🌋.
Reposted by Etienne Médard
No seriously, the reason to vote for haüyne is that it's the absolute bluest thing--it is the super expensive blue that traditional aquamarine paint was made from (lazurite per MinDat when analyzed is just a variety of haüyne).
Haüyne
Sodalite Group.
Also classed in the Feldspathoid Supergroup.
Ideally, the two sodalite cages in haüyne's unit cell contain Na^3CaSO^4.
Pale-coloured ...
www.mindat.org
September 25, 2025 at 4:28 AM
No seriously, the reason to vote for haüyne is that it's the absolute bluest thing--it is the super expensive blue that traditional aquamarine paint was made from (lazurite per MinDat when analyzed is just a variety of haüyne).
For my American friends…
Keep in mind that this is taken from a Disney production, one that just this week won an Emmy.
It may sound vaguely apropos.
youtu.be/KYnE2Mxayco?...
It may sound vaguely apropos.
youtu.be/KYnE2Mxayco?...
Andor Season 2 | Mon Mothma’s Senate Speech | Now Streaming on Disney+
YouTube video by Star Wars
youtu.be
September 20, 2025 at 5:54 PM
For my American friends…
Reposted by Etienne Médard
▶️ La campagne en mer MAYOBS33 aura lieu du 25/09 au 14/10/2025 à bord du Marion Dufresne. Cette mission s'inscrit dans le cadre des campagnes océanographiques de surveillance du REVOSIMA. Plus d'informations ici👇
@ipgp.bsky.social
@brgm.fr
@cnrs-insu.bsky.social
@ifremer.bsky.social
@ipgp.bsky.social
@brgm.fr
@cnrs-insu.bsky.social
@ifremer.bsky.social
September 16, 2025 at 4:38 PM
▶️ La campagne en mer MAYOBS33 aura lieu du 25/09 au 14/10/2025 à bord du Marion Dufresne. Cette mission s'inscrit dans le cadre des campagnes océanographiques de surveillance du REVOSIMA. Plus d'informations ici👇
@ipgp.bsky.social
@brgm.fr
@cnrs-insu.bsky.social
@ifremer.bsky.social
@ipgp.bsky.social
@brgm.fr
@cnrs-insu.bsky.social
@ifremer.bsky.social
Reposted by Etienne Médard
An unexpected discovery of IODP Exp 398! 200 m of ash from the Kos Plateau Tuff eruption buried in the basins around Santorini, read how it got there in our new paper in Science Advances 🌋
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Submarine ash megabed fed by far-traveled, shoreline-crossing pyroclastic currents from a large explosive volcanic eruption
Volcanic ash from an eruption in Greece poured into the sea, forming a bed 200 m thick in a submarine basin far from the volcano.
www.science.org
August 13, 2025 at 6:21 PM
An unexpected discovery of IODP Exp 398! 200 m of ash from the Kos Plateau Tuff eruption buried in the basins around Santorini, read how it got there in our new paper in Science Advances 🌋
www.science.org/doi/10.1126/...
www.science.org/doi/10.1126/...
Reposted by Etienne Médard
We tried compiling a global database of deposit descriptions of pyroclastic density current deposits. The aim was to help us do big data analysis, look for common trends, and to support modelling.
We got some interesting results but also, found some really significant issues and gaps #IAVCEI2025
We got some interesting results but also, found some really significant issues and gaps #IAVCEI2025
July 4, 2025 at 8:05 AM
We tried compiling a global database of deposit descriptions of pyroclastic density current deposits. The aim was to help us do big data analysis, look for common trends, and to support modelling.
We got some interesting results but also, found some really significant issues and gaps #IAVCEI2025
We got some interesting results but also, found some really significant issues and gaps #IAVCEI2025
Reposted by Etienne Médard
What happens when a dense, aerated granular flow encounters a vertical barrier? What night these mean for the behaviours of pyroclastic density currents? Check out Jordan Chenery's poster at #IAVCEI2025
July 4, 2025 at 9:09 AM
What happens when a dense, aerated granular flow encounters a vertical barrier? What night these mean for the behaviours of pyroclastic density currents? Check out Jordan Chenery's poster at #IAVCEI2025
Reposted by Etienne Médard
hello hi i am presenting a poster #IAVCEI2025 (session 3.4) on long-lasting ashy rhyolite eruptions esp. in Iceland, come chat come come
July 4, 2025 at 9:20 AM
hello hi i am presenting a poster #IAVCEI2025 (session 3.4) on long-lasting ashy rhyolite eruptions esp. in Iceland, come chat come come
Reposted by Etienne Médard
Poster board 165 today at #IAVCEI2025 !
Come see my ongoing PhD research project 🪨
Come see my ongoing PhD research project 🪨
July 1, 2025 at 12:02 PM
Poster board 165 today at #IAVCEI2025 !
Come see my ongoing PhD research project 🪨
Come see my ongoing PhD research project 🪨
Reposted by Etienne Médard
My poster is up at #IAVCEI2025! Come through and get a free sticker while you learn about the US’s new IHPV #forceasu @forcehighp.bsky.social @iavcei.bsky.social
July 1, 2025 at 7:20 AM
My poster is up at #IAVCEI2025! Come through and get a free sticker while you learn about the US’s new IHPV #forceasu @forcehighp.bsky.social @iavcei.bsky.social
Reposted by Etienne Médard
Come and see my poster today at #IAVCEI2025 if you love field volcanology and pyroclastic density currents
July 1, 2025 at 9:34 AM
Come and see my poster today at #IAVCEI2025 if you love field volcanology and pyroclastic density currents
Still not in Geneva today 😒 #IAVCEI2025 but if you are interested in volcanic textures and highly explosive basaltic eruptions please go to poster board 97 tonight to see Lisa's work on the 8600 BP subplinian eruption of La Vache and Lassolas in the French Chaîne des Puys 🌋
July 1, 2025 at 9:50 AM
Still not in Geneva today 😒 #IAVCEI2025 but if you are interested in volcanic textures and highly explosive basaltic eruptions please go to poster board 97 tonight to see Lisa's work on the 8600 BP subplinian eruption of La Vache and Lassolas in the French Chaîne des Puys 🌋
Unfortunately I cannot be at #IAVCEI2025 today, but for people interested in olivine diffusion chronometry, please come see our posters 62 (Mayotte, presented by Kalini) and 65 (Ambae, Vanuatu, presented by Eva)🌋
June 30, 2025 at 2:16 PM
Unfortunately I cannot be at #IAVCEI2025 today, but for people interested in olivine diffusion chronometry, please come see our posters 62 (Mayotte, presented by Kalini) and 65 (Ambae, Vanuatu, presented by Eva)🌋
Structural geology fieldcamp for the finishing undergraduate students on beautiful Cap de Creus (with @caroline-lotout.bsky.social and Valérie Bosse). Starting with folding and bedding/cleavage relationships in a very low-grade greso-pelitic series.
May 15, 2025 at 8:26 AM
Structural geology fieldcamp for the finishing undergraduate students on beautiful Cap de Creus (with @caroline-lotout.bsky.social and Valérie Bosse). Starting with folding and bedding/cleavage relationships in a very low-grade greso-pelitic series.
Today I was teaching binary phase diagrams with a solvus to undergrads so here is a pretty perthite with a Carlsbad twin from the hypersolvus Tolla granite (Corsica) for #ThinSectionThursday ⚒️
February 13, 2025 at 10:19 PM
Today I was teaching binary phase diagrams with a solvus to undergrads so here is a pretty perthite with a Carlsbad twin from the hypersolvus Tolla granite (Corsica) for #ThinSectionThursday ⚒️
Hi @earth-science.bsky.social can you add me to the feed please? Thanks! Etienne
February 9, 2025 at 4:49 PM
Hi @earth-science.bsky.social can you add me to the feed please? Thanks! Etienne
For #VolcanoMonday, I give you Manaro Voui volcano, a shield volcano on the Island of #Ambae in the #Vanuatu arc. A poorly known volcano, it flew under the radar until unrest started in the 1990s, culminating in a major eruption in 2017-2018 that lead twice to the evacuation of the entire island.⚒️🧪🌋
February 3, 2025 at 10:05 PM
For #VolcanoMonday, I give you Manaro Voui volcano, a shield volcano on the Island of #Ambae in the #Vanuatu arc. A poorly known volcano, it flew under the radar until unrest started in the 1990s, culminating in a major eruption in 2017-2018 that lead twice to the evacuation of the entire island.⚒️🧪🌋
January 27, 2025 at 9:23 PM
Short introduction since I have not yet been really active here. Igneous petrologist working mostly on volcanic rocks using field, analytical, and experimental tools. Also teaching (faculty at Université Clermont Auvergne). Interested in anything linked to nature: mineral, plant, animal, landscape
January 27, 2025 at 9:09 PM
Short introduction since I have not yet been really active here. Igneous petrologist working mostly on volcanic rocks using field, analytical, and experimental tools. Also teaching (faculty at Université Clermont Auvergne). Interested in anything linked to nature: mineral, plant, animal, landscape
Reposted by Etienne Médard
Watch these snowflake-like dendritic clinopyroxenes twinkle as this thin section is rotated in cross-polarised light!❄️☃️ This is a rare volcanic rock called komatiite, from Gorgona. Credit: Charlie Gordon. #ThinSectionTuesday #Petrology #Mineralogy
December 17, 2024 at 9:25 AM
Watch these snowflake-like dendritic clinopyroxenes twinkle as this thin section is rotated in cross-polarised light!❄️☃️ This is a rare volcanic rock called komatiite, from Gorgona. Credit: Charlie Gordon. #ThinSectionTuesday #Petrology #Mineralogy
First day of our undergraduate fieldcamp looking at deformation and metamorphism on the beautiful Cap_de_Creus - deformation in a low-grade gresopelitic sequence and relationships between bedding and schistosity (Cadaques)
May 14, 2024 at 4:32 PM
First day of our undergraduate fieldcamp looking at deformation and metamorphism on the beautiful Cap_de_Creus - deformation in a low-grade gresopelitic sequence and relationships between bedding and schistosity (Cadaques)