🇨🇦 Geologist, @NRCan-GSC | Critical minerals in volcanic 🌋 environments | The Mackenzie large igneous province | elle, she, her | Views are my own.
Ottawa, Canada
Joined December 2011
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Marie-Claude Williamson retweeted
“For after all, the best thing one can do when it is raining is let it rain.”
― Henry Wadsworth Longfellow
Marie-Claude Williamson retweeted
American Mineralogist:
Modraite, Ca19Fe2+Al4(Al7Fe2+)(SiO4)10(Si2O7)4O(OH)9, a new vesuvianite-group mineral from the Modra skarn,Malé Karpaty Mountains, Slovakia
Pavel Uher, et al.
doi.org/10.2138/am-2025-1000…
Marie-Claude Williamson retweeted
Announcing the winner of the Museum’s 2027 Michael Collins Trophy for Current Achievement: The Artemis II Mission Team
@NASA's Artemis II mission captured the attention of the world in April 2026 as commander Reid Wiseman, pilot Victor Glover, and mission specialists Christina Koch and Jeremy Hansen traveled around the Moon and back — the first crewed deep space mission in over 50 years.
ALT A group of four people in matching black shirts are in a spacecraft. They are surrounded by equipment and supplies. Two flags, the United States and Canada, are displayed behind them.
ALT The image shows a crescent view of the moon in the foreground with Earth visible in the distant background against a dark space backdrop.
Marie-Claude Williamson retweeted
Feet dangling over Earth at 28000 km/hr. Don’t look down! (Kidding - definitely look down, because Earth is stunningly beautiful).
Thank you @drcrater for giving today’s Logan Club presentation at @NRCan’s Geological Survey of Canada in Ottawa. A fascinating update on the science behind the @NASAArtemis exploration program, recent and future lunar missions and #geology training for astronauts.
Marie-Claude Williamson retweeted
HiPOD: Layering and Cross-Cutting Bands
This mound exhibits layering and cross-cutting bands that correspond to an iron/magnesium phyllosilicate composition elsewhere in mounds in Chryse Planitia.
uahirise.org/hipod/ESP_07287…
NASA/JPL-Caltech/University of Arizona
#Mars #NASA
Marie-Claude Williamson retweeted
Night time lapse, Indonesia to North of Japan. A very lively atmosphere up high, with dizzying human activity down low. Blue lights are fishing trawlers hard at work.
Marie-Claude Williamson retweeted
In #Canada , Indigenous peoples play an active role in Arctic preparedness. A researcher argues that Norway should learn from the Canadian model to strengthen its total defence and counter hybrid threats in the north.
@UiTNorgesarktis #canada #INDIGENOUS
en.highnorthnews.com/science…
Marie-Claude Williamson retweeted
HiPOD: Ancient Bedrock in the Southern Highlands
This image of an ancient rocky hill proved to be surprisingly colorful due to diverse rock compositions. The bluish and greenish rocks are probably unaltered rocks rich in pyroxenes and olivine.
uahirise.org/ESP_093841_1480
#Mars
ALT Enhanced color cutout shows a closeup of bedrock on the surface of Mars with diverse composition of minerals.
Marie-Claude Williamson retweeted
HiPOD: Ancient Layers Exposed by a Crater within a Crater
This close-up view of the rim of an impact crater shows thin layers that overlie much more extensive ones. These varied colors likely mark different compositions.
More: uahirise.org/ESP_092552_1420
#Mars #science #NASA
ALT Enhanced color closeup shows detail of the rim of an impact crater on Mars with exposure of light-toned layers of bedrock.
Marie-Claude Williamson retweeted
What can lava samples tell us about Kīlauea’s recent summit lava fountains? 🌋
Since the current eruption began in late 2024, scientists with our USGS Hawaiian Volcano Observatory have analyzed 178 lava samples from episodes 1–39 to better understand the magma feeding the eruption and changes occurring beneath the surface.
Here’s what they found:
💠 Variations in fountain height and episode duration are not associated with significant compositional changes
💠 The eruption is fed by lava from the magma chamber that is about a mile (1–2 km) beneath Halemaʻumaʻu
💠 There is evidence that the parts of former lava lake eruptions in Halemaʻumaʻu (between 2020–2023) remain molten below the surface and sometimes influence the chemistry of material erupted by lava fountaining
💠 A subtle change in chemistry suggests that a new magma was erupted within a few weeks of the eruption onset
💠 Kīlauea’s shallow magma storage system beneath Halemaʻumaʻu showed an increase in temperature through fountaining episodes 1–39
Together, these findings offer new clues about the magma system driving Kīlauea’s ongoing eruption.
Read the full article: ow.ly/QTKB5101RA0
📷1-2: A scientist collecting fresh lava samples from the Kilauea.
📷3: Analyzing lava samples in the lab.
📷4: An annotated image of a lava sample under a microscope.
@USGSVolcanoes
ALT Scientist in protective gear collecting molten lava sample from a flowing lava field during a volcanic eruption.
ALT Scientist in protective gear examining cooling lava formations on a volcanic field with visible red-hot molten rock.
ALT Person doing lab work on a glass surface on a laboratory table, surrounded by beakers, glass bowls, and vials.
ALT An annotated image of a lava sample under a microscope.
Marie-Claude Williamson retweeted
HiPOD: A Flow Intersection
At this location, a portion of the Cerberus Fossae seems to intersect with the edge of a lava flow or other feature nearly perpendicular to the fossae. This could be a good location to investigate stratigraphic relationships.
uahirise.org/hipod/ESP_06963…
Learning happens as a consequence of cognitive processing. Cognitive processing is typically effortful, and that’s what AI effectively removes,” says cognitive psychologist Daniel Willingham at the University of Virginia in Charlottesville. “People are really worried about that.”
There is growing concern that AI can blunt memory and reasoning. Specialists in education and cognition have useful tips on how to stay cognitively sharp in the age of AI, according to a feature in Nature. go.nature.com/4rsFJVj
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Marie-Claude Williamson retweeted
October 29th and November 5th!
Check out #spacewalks by @Astro_Kutryk and @astro_anil supported by @Astro_Jenni as CAPCOM! 🧑🚀👩🚀🦾
From CSA astronaut Joshua Kutryk to Canadarm2 and teams on the ground, discover Canada’s multiple roles in the two upcoming spacewalks. asc-csa.gc.ca/eng/news/artic…
Marie-Claude Williamson retweeted
[English below] 🚀 Exploration humaine et robotique ne s’opposent pas, elles se complètent ! 🤖🌕 Ce soir, direction les lunes de Mars avec la mission japonaise MMX et son petit rover franco-allemand IDEFIX® ! Une belle aventure scientifique et technologique. Bravo aux équipes ! 🇫🇷🇯🇵
Plus d’infos : lnkd.in/p/e2D5nBvy
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🚀 Human and robotic space exploration go hand in hand! 🤖🌕 Tonight, Japan’s MMX mission heads for the moons of Mars, carrying the French-German rover IDEFIX®! A fantastic scientific adventure showcasing international cooperation. 🇫🇷🇯🇵
More infos in the link above.
©️@Makkisse999 - JAXA -DLR
@JAXA_en @mmx_jaxa_jp @DLR_SpaceAgency @DLR_en @DLR_de @CNES
Marie-Claude Williamson retweeted
HMCS ROBERT HAMPTON GRAY transiting the Bellot Strait during Operation Nanook-NANUKPUT on September 13, 2026. Photo: Corporal Paquette, Canadian Armed Forces Photo #RCN #Photo #RoyalCanadianNavy
Marie-Claude Williamson retweeted
Polar Bears are seen from the quarterdeck of HMCS ROBERT HAMPTON GRAY in the Beaufort Sea during Operation LATITUDE on September 27, 2026. Photo: Corporal Paquette, Canadian Armed Forces 2026 #RCN #Photo #RoyalCanadianNavy
Marie-Claude Williamson retweeted
HiPOD: A Ridge in Arabia Terra
The objective of this observation is to examine a straight ridge that might be a dike. Sometimes magma (molten rock) below the surface may fill an existing fracture, even pushing the fracture open in the process.
uahirise.org/hipod/ESP_06530…
#Mars
