This week’s #MicrometeoriteMonday: A stylish "micrometeorwrong" we found in sediments from the Atacama desert! Though it has the shape of a cosmic spherule, the sample displays a composition and texture atypical of a true #micrometeorite. ☄️

This week’s #MicrometeoriteMonday: A cosmic spherule nested below some terrestrial sediments from Sør Rondane Mountains, Antarctica! Unlike the micrometeorites we commonly post on our account, this one has yet to be classified! ☄️

This week’s #MicrometeoriteMonday: A pretty porphyritic olivine (Po) cosmic spherule from the Sør Rondane Mountains, Antarctica! Though Po spherules are not uncommon, this one stands out for its abundance of small, leaf-like magnetite dendrites. ☄️

This week’s #MicrometeoriteMonday: A polished scoriaceous micrometeorite from the Sør Rondane Mountains, Antarctica! Unlike fully melted cosmic spherules, scoriaceous micrometeorites are only partially melted and tend to contain abundant vesicles formed by devolatilization. ☄️

This week’s #MicrometeoriteMonday: A polished V-type cosmic spherule from the late Devonian! Though V-types rarely last long on Earth due to weathering, this one seems to have “survived” by being replaced by palagonite: preserving its texture, but not its original mineralogy! ☄️

This week’s #MicrometeoriteMonday: A polished I-type cosmic spherule from the late Devonian! Though corrosion has left a large cavity where an FeNi bead once was, and etched the spherule, remnants of its primary dendritic texture remain visible after nearly 400 million years! ☄️

This week’s M. Monday: a rare transitional "I/G-type" cosmic spherule! Indeed, not all cosmic spherules fit neatly into the traditional S-, G-, and I-type categories. After analyzing thousands of samples, you’re bound to encounter a few oddballs that blur the boundaries! 😎☄️

We are back with Micrometeorite Monday! ☄️ This week’s sample is a rare *fossil* S-type (BO-subtype) cosmic spherule from the Chanxhe collection. While most S-types do not survive the fossilization process, this specimen still preserves part of its original silicate content, a rare find!

This week’s Micrometeorite Monday: A polished section of a V-type cosmic spherule from the Atacama Desert! This cool spherule consists almost entirely of silicate glass, plus several tiny FeNi-metal beads. ☄️

This week’s Micrometeorite Monday: A polished section of a Porphyritic olivine (Po-type) cosmic spherule from the Sør Rondane Mountains (Antarctica), showing typical well-defined olivine crystals in a glassy matrix with scattered magnetite grains ☄️

Similarly, project lead Steven Goderis and the postdoctoral researchers did an excellent job presenting their research at Goldschmidt 2026, covering topics from #micrometeorite characterization and preservation, as well as #microtektites! ☄️

Back from Goldschmidt 2026 in #Montréal! We had a great time presenting our ongoing research on modern and fossil #micrometeorites! Our PhD members did an excellent job presenting their work as both posters and talks! ☄️

This week’s Micrometeorite Monday: A polished section of a peculiar fossil I-type cosmic spherule from the Chanxhe collection (~380 Ma). Its unusual shape preserves an elongated cavity left by the ejection of a FeNi-metal bead during atmospheric entry! ☄️

This week’s Micrometeorite Monday: Nearly 100 of the ~1,000 Antarctic cosmic spherules on this microscope slide, captured with one of our optical stereoscopes! These tiny extraterrestrial particles measure just 63–125 µm across ☄️

This week’s Micrometeorite Monday: a photogenic S-type cosmic spherule from the Atacama Desert. It's of the Porphyritic Olivine (Po) subtype, though quite rich in magnetite. Full view (left) and close-up (right), highlighting its pretty magnetite dendrites! ☄️

This week’s Micrometeorite Monday: a nice S-type cosmic spherule from the Atacama Desert, of the cryptocrystalline (CC) subtype. This CC is more specifically of the “turtleback” variety, based on the characteristic “spiky” shape of its olivine crystals ☄️

This week’s Micrometeorite Monday: a nice S-type cosmic spherule from the Atacama Desert, more specifically of the Porphyritic olivine (PO)-type. It shows characteristic equant olivine crystals set in glass, along with some pretty magnetite crystals! ☄️

Hello everyone! To further showcase our work, we are launching "Micrometeorite Monday", a weekly post featuring a photo of one of the *thousands* of MMs discovered by the FLUX team, along with a short description for that week’s sample. We hope you enjoy this new series! ☄️

Great job to our team member, Phoenix, who presented at this year’s Dag van de Wetenschap! The focus was mainly on meteoritics, in particular the Ordovician meteor event. ☄️☄️

Wishing everyone a Happy New Year! ☄️ To start the year, here are a few snapshots from December fieldwork conducted by our team member Deepak in the Lesser Himalayas and the Kutch Basin, together with a couple of other @AMGC_VUB members! 😊