Etienne Médard
@etiennemedard.bsky.social
Earth and planetary scientist (igneous petrology / volcanology) and nature enthusiast - Associate Prof @UCAuvergne - Views are my own.
October 13, 2025 at 8:59 PM
And if you are into geochronology, at poster 80 #IAVCEI2025 Mathilde has a bunch of very precise new ages on submarine volcanism offshore Mayotte🌋
July 1, 2025 at 9:54 AM
And if you are into geochronology, at poster 80 #IAVCEI2025 Mathilde has a bunch of very precise new ages on submarine volcanism offshore Mayotte🌋
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 🌋
Also, Nicole is presenting poster 37 on pre-eruptive conditions of the 800 BP Quilotoa eruption (Ecuador), a VEI6 dacitic eruption originating from a 15 km deep storage 🌋#IAVCEI2025
June 30, 2025 at 2:30 PM
Also, Nicole is presenting poster 37 on pre-eruptive conditions of the 800 BP Quilotoa eruption (Ecuador), a VEI6 dacitic eruption originating from a 15 km deep storage 🌋#IAVCEI2025
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)🌋
Looking at shear zones and investigating shear criteria on beautiful #Cap_de_Creus with undergraduate students #geoscience ⚒️
May 17, 2025 at 8:45 PM
Looking at shear zones and investigating shear criteria on beautiful #Cap_de_Creus with undergraduate students #geoscience ⚒️
The greso-pelitic series is getting hotter with nice andalousite (and cordierite) porphyroblasts and again multiple deformation phases #geoscience ⚒️on the way to the cape.
May 15, 2025 at 9:05 PM
The greso-pelitic series is getting hotter with nice andalousite (and cordierite) porphyroblasts and again multiple deformation phases #geoscience ⚒️on the way to the cape.
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.
I also got some pretty exsolutions in a norite from the Bushveld complex #ThinSectionThursday ⚒️
February 13, 2025 at 10:21 PM
I also got some pretty exsolutions in a norite from the Bushveld complex #ThinSectionThursday ⚒️
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 ⚒️
All pictures where taken in July 2024, the impact figure below was one-month old at the time. Ongoing work on the volcanic history of the island and interactions between the island inhabitants and their volcano is part of the research project "EmVolDiVa" (website in French) emvoldiva.hypotheses.org
February 3, 2025 at 10:28 PM
All pictures where taken in July 2024, the impact figure below was one-month old at the time. Ongoing work on the volcanic history of the island and interactions between the island inhabitants and their volcano is part of the research project "EmVolDiVa" (website in French) emvoldiva.hypotheses.org
The 2017-2018 eruption destroyed the lush tropical vegetation, leaving only dead trunks near the summit - this is a harsh place for animals and plants
February 3, 2025 at 10:14 PM
The 2017-2018 eruption destroyed the lush tropical vegetation, leaving only dead trunks near the summit - this is a harsh place for animals and plants
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
Absolutely no water, absolutely no trace of egg yolks. Eggs at room temperature. Enough caster sugar, no substitute. Beat the whites as hard as you can, they should be hard to the touch. Start without sugar, add the sugar while beating. Slow cooking at low temperature (120 °C). Good luck!!!
November 27, 2024 at 9:24 PM
Absolutely no water, absolutely no trace of egg yolks. Eggs at room temperature. Enough caster sugar, no substitute. Beat the whites as hard as you can, they should be hard to the touch. Start without sugar, add the sugar while beating. Slow cooking at low temperature (120 °C). Good luck!!!
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)
First few #orchids of the season on a sunny limestone slope (likely Anacamptis morio) #botany #wildflowers
April 16, 2024 at 8:58 PM
First few #orchids of the season on a sunny limestone slope (likely Anacamptis morio) #botany #wildflowers
First mushroom of the year 😋
April 15, 2024 at 7:40 PM
First mushroom of the year 😋