Marie-Claude Williamson

HiPOD: Bedrock in Valles Marineris This image was targeted to a region showing mineral diversity in the CRISM hyperspectral data. The enhanced-color cutout shows a portion of the scene with diverse colors, indicating different rock types. uahirise.org/hipod/ESP_0919… #Mars #science

March in Montreal 🎨🖌️ Watercolours. #myart

Nunavut is the largest electoral district on Earth and it is roughly four times the size of France

HiPOD: Layered Sediments in Valles Marineris Sediments rich in hydrated sulfates may have filled central Valles Marineris, but debates persist as to how these deposits grew or formed. More: uahirise.org/hipod/ESP_0725… NASA/JPL-Caltech/University of Arizona #Mars #science #NASA

HiPOD: Exploring Northeast Syrtis via Jezero Crater A key attraction of Syrtis for missions is lithologic diversity spanning a broad interval of early Mars epochs in clear and readily accessible stratigraphic context throughout landing ellipses. uahirise.org/hipod/ESP_0540…

@Canadensys1 Comments on the Termination of the Lunar Rover Mission canadensys.com/canadensys-aer…

Thin Section Thursday! Rapid growth of olivine in an experiment. Features skeletal branching (thicker, higher birefringence) and progressive infilling (lower birefringence domains). Crystal is about 1mm in size. XPL From Thomas Shea, Univ. of Hawai’i #thinsectionthursday

#VolcanoWatch this week summarizes the natural events at Kīlauea’s summit last week, heavy tephra fallout on March 10 followed days later by a powerful Kona low, which echo the interactions of Pele, Lono, and Hiʻiaka described in Native Hawaiian oral traditions. 🌋🌧️🌱 Learn More: usgs.gov/observatories/… 📸1: Kīlauea lava fountains on June 29, 2025, with red lehua blossoms of the native ʻōhia tree framing the foreground. 📸2: Partially tephra-buried ʻamaʻu fern that was unfurling new fronds on May 11, 2025, just a few hundred yards (meters) from the western rim of Halemaʻumaʻu crater and the active eruptive vents in Halemaʻumaʻu at the summit of Kīlauea.

HiPOD: Lava in Athabasca Valles Evidence of large-scale flooding by lava is revealed by a number of features. When the crust breaks apart, rafted sections give an appearance of patterns that can be fit back together like a jigsaw puzzle. uahirise.org/ESP_090181_1875 #Mars #NASA

A new research project will map the extent of environmental wear due to increased tourism. This is especially important in the north, where nature takes longer to recover than in the south, says researcher Elina Hutton. en.highnorthnews.com/science/new-pr…

Il y a 6,3 millions d’années, un astéroïde géant a frappé le Brésil, 1er champ de tectites (verre “spatial”) en Amérique du Sud ! Des “geraisites”, perles noires de verre fondu ont été retrouvées à travers les États du Minas Gerais, Bahia et Piauí. eos.org/articles/scien…

When OSIRIS-REx reached the asteroid Bennu in 2018, scientists expected to find a smooth, beach-like surface. Instead, they encountered a jagged, rugged world. Samples of the asteroid, brought back to Earth in 2023, are helping untangle the mystery: go.nasa.gov/4cMGBPb

Mood: going with the flow 🌀 Swirling patterns in Cañon Fiord were revealed during the 2022 summer melt season, when broken sea ice and sediment traced eddies in the water. Landsat 8 captured the swirls from space. go.nasa.gov/4bxOfuz

Arctic research should be accessible and actionable. @ArcticScienceJ invites contributions on knowledge mobilization strategies, including co-production, synthesis, and creative approaches like podcasts and land-based activities ▶️ ow.ly/RjvS50VrAj6

HiPOD: Colorful Rocks near Chaotic Terrains Chaos can be beautiful! This image covers rocky plains in a low-latitude area of Mars, which lie adjacent to pits containing scattered blocks of high-standing material, called “chaos terrains.” uahirise.org/hipod/ESP_0906… #Mars #science

Comet C/2023 A3 framed by the ISS Canadarm, SpaceX Crew Dragon and the sunlit rim of Earth near orbital dawn.

HiPOD: A Light Outcrop in Aurorae Chaos This observation shows a light, layered outcrop in Aurorae Chaos. The surrounding material is much darker than this outcrop. We can also look for variations between the layers. uahirise.org/hipod/ESP_0768… #Mars #science #NASA

🌧️ C’est vendredi, il pleut et tout est gris ? Ma suggestion c’est de retrouver un peu du bleu du ciel (et pas mal de bleu-blanc-rouge 🇫🇷) avec Athos, le film dans les coulisses de la @PAFofficiel ✈️, qui doit bien être sur un écran près de chez vous. 🎬 Je n’étais pas allé au cinéma depuis un moment, mais ce film est un petit évènement pour tous ceux qui aiment l’aéronautique. @Airbus a eu la bonne idée de convier tous les navigants des essais en vol à une séance cette semaine. 🎥 Il va sans dire que les images sont somptueuses (beaucoup de progrès sur les scènes aériennes depuis Top Gun ! 😎). On frissonne et on tremble avec ceux et celles qui font la #PAF, comme si on y était. 💪 C’est une évidence qu’énormément de travail et de persévérance sont nécessaires pour, chaque année, être au rendez-vous au plus haut niveau. Mais c’est quand même quelque chose de le voir en vrai, au plus près des machines et des humains. L’exigence, le défi, l’adrénaline, la camaraderie… la joie, mais les doutes aussi parfois. #patrouilledefrance #athos #film #cinema

I am so pleased to share that my latest paper on the lunar meteorite NWA 12593 and its surprising chlorine isotopes has now been published in a GSL Special Publication all about early career contributions to planetary science! Check it out: lyellcollection.org/doi/full/10.11…

How Geoscientists Think and Learn - Eos eos.org/features/how-g…