Marie-Claude Williamson
@mc-north.bsky.social
🇨🇦 Geologist, Canadian Arctic | Critical minerals in volcanic 🌋 environments | Mackenzie LIP | Arctic Ocean & Ridges | elle, she, her | Views are my own.
Reposted by Marie-Claude Williamson
A magnesium-rich basalt retrieved by the Apollo 12 mission from the Moon. brightly coloured pyroxene and olivine surround grey plagioclase in cross-polars.
This photo was taken in 2003 from a travelling collection of thin sections sponsored by NASA […]
[Original post on fosstodon.org]
This photo was taken in 2003 from a travelling collection of thin sections sponsored by NASA […]
[Original post on fosstodon.org]
November 20, 2025 at 4:14 PM
A magnesium-rich basalt retrieved by the Apollo 12 mission from the Moon. brightly coloured pyroxene and olivine surround grey plagioclase in cross-polars.
This photo was taken in 2003 from a travelling collection of thin sections sponsored by NASA […]
[Original post on fosstodon.org]
This photo was taken in 2003 from a travelling collection of thin sections sponsored by NASA […]
[Original post on fosstodon.org]
Reposted by Marie-Claude Williamson
T.S. Thursday!
Large rounded grains of garnet surrounded by masses of muscovite mica and biotite mica. Also found are small, brown oval-shaped grains of tourmaline. By Larry Tuttle, U Maine Farmington. Send images and short caption to akoziol1 at udayton dot edu. #thinsectionthursday
Large rounded grains of garnet surrounded by masses of muscovite mica and biotite mica. Also found are small, brown oval-shaped grains of tourmaline. By Larry Tuttle, U Maine Farmington. Send images and short caption to akoziol1 at udayton dot edu. #thinsectionthursday
November 20, 2025 at 1:52 PM
T.S. Thursday!
Large rounded grains of garnet surrounded by masses of muscovite mica and biotite mica. Also found are small, brown oval-shaped grains of tourmaline. By Larry Tuttle, U Maine Farmington. Send images and short caption to akoziol1 at udayton dot edu. #thinsectionthursday
Large rounded grains of garnet surrounded by masses of muscovite mica and biotite mica. Also found are small, brown oval-shaped grains of tourmaline. By Larry Tuttle, U Maine Farmington. Send images and short caption to akoziol1 at udayton dot edu. #thinsectionthursday
Reposted by Marie-Claude Williamson
A 1.4 Ga organic rich mudstone from Australia that has low-grade contact metamorphism. Black blobs with crystal cores are thucolites, brown square is a fragment of microfossil that has been partially mineralised. More deets in alt text. #ThinSectionThursday #Geology #paleontology ⚒️🧪🔬
November 20, 2025 at 9:04 AM
A 1.4 Ga organic rich mudstone from Australia that has low-grade contact metamorphism. Black blobs with crystal cores are thucolites, brown square is a fragment of microfossil that has been partially mineralised. More deets in alt text. #ThinSectionThursday #Geology #paleontology ⚒️🧪🔬
Reposted by Marie-Claude Williamson
⚒️ - a bit early for #ThinSectionThursday but what the hell
💛🧡❤️ This microscopic view of a rock from Mountsorrel is full of autumn colours!
📍 East side of Mountsorrel Quarry
ℹ️ "Quartz dolerite", Dr Hallimond
©️ British Geological Survey
📍 East side of Mountsorrel Quarry
ℹ️ "Quartz dolerite", Dr Hallimond
©️ British Geological Survey
November 19, 2025 at 11:14 AM
⚒️ - a bit early for #ThinSectionThursday but what the hell
Reposted by Marie-Claude Williamson
Back to #Iceland photos from my recent trip. And here's another view of the marvellous yellow river estuary where it meets the sea at a black sand beach.
#DronePhotography #DJIMavic3Pro
#DronePhotography #DJIMavic3Pro
November 16, 2025 at 2:44 PM
Back to #Iceland photos from my recent trip. And here's another view of the marvellous yellow river estuary where it meets the sea at a black sand beach.
#DronePhotography #DJIMavic3Pro
#DronePhotography #DJIMavic3Pro
Reposted by Marie-Claude Williamson
🫧 Our scientists recently found ice in Antarctica that’s 6 million years old, trapped ancient air inside. These "time capsules" offer a rare peek into Earth’s past atmosphere and how our planet has changed.
📲Pop into the research at @iflscience.com: go.whoi.edu/ifl-ice
📲Pop into the research at @iflscience.com: go.whoi.edu/ifl-ice
November 16, 2025 at 2:59 PM
🫧 Our scientists recently found ice in Antarctica that’s 6 million years old, trapped ancient air inside. These "time capsules" offer a rare peek into Earth’s past atmosphere and how our planet has changed.
📲Pop into the research at @iflscience.com: go.whoi.edu/ifl-ice
📲Pop into the research at @iflscience.com: go.whoi.edu/ifl-ice
Reposted by Marie-Claude Williamson
HiPOD: Colorful Bedrock in the Central Uplift of an Impact Crater
This bedrock has greater compositional diversity than the surface layers, because they are from greater depths, older, jumbled, and altered, and very diverse.
https://uahirise.org/hipod/ESP_045519_1730
#Mars #science #NASA
This bedrock has greater compositional diversity than the surface layers, because they are from greater depths, older, jumbled, and altered, and very diverse.
https://uahirise.org/hipod/ESP_045519_1730
#Mars #science #NASA
November 16, 2025 at 3:01 PM
HiPOD: Colorful Bedrock in the Central Uplift of an Impact Crater
This bedrock has greater compositional diversity than the surface layers, because they are from greater depths, older, jumbled, and altered, and very diverse.
https://uahirise.org/hipod/ESP_045519_1730
#Mars #science #NASA
This bedrock has greater compositional diversity than the surface layers, because they are from greater depths, older, jumbled, and altered, and very diverse.
https://uahirise.org/hipod/ESP_045519_1730
#Mars #science #NASA
Reposted by Marie-Claude Williamson
#GeoCinema is back for #EGU26!
Whether you have filmed fantastic spectacles in the field or produced an educational feature on the Earth, planetary, or space sciences - it's time to submit your short film 🎞️!
📅Submission deadline: 5 December 2025
👀 Application details: egu.eu/13NFE9
Whether you have filmed fantastic spectacles in the field or produced an educational feature on the Earth, planetary, or space sciences - it's time to submit your short film 🎞️!
📅Submission deadline: 5 December 2025
👀 Application details: egu.eu/13NFE9
November 12, 2025 at 12:33 PM
#GeoCinema is back for #EGU26!
Whether you have filmed fantastic spectacles in the field or produced an educational feature on the Earth, planetary, or space sciences - it's time to submit your short film 🎞️!
📅Submission deadline: 5 December 2025
👀 Application details: egu.eu/13NFE9
Whether you have filmed fantastic spectacles in the field or produced an educational feature on the Earth, planetary, or space sciences - it's time to submit your short film 🎞️!
📅Submission deadline: 5 December 2025
👀 Application details: egu.eu/13NFE9
Reposted by Marie-Claude Williamson
🌋 Meet the Pioneer of 4K Volcano Livestreams: Ryan Logtenberg 🏔
Documenting the raw power of volcanoes isn't just his passion, it's his life's mission. ❤🔥
Read more about his work:
Documenting the raw power of volcanoes isn't just his passion, it's his life's mission. ❤🔥
Read more about his work:
November 12, 2025 at 1:20 PM
🌋 Meet the Pioneer of 4K Volcano Livestreams: Ryan Logtenberg 🏔
Documenting the raw power of volcanoes isn't just his passion, it's his life's mission. ❤🔥
Read more about his work:
Documenting the raw power of volcanoes isn't just his passion, it's his life's mission. ❤🔥
Read more about his work:
Reposted by Marie-Claude Williamson
Get to know the IAVCEI Commission of Cities and Volcanoes (CaV) 🌋
CaV links the volcanology community with emergency managers, fostering the exchange of ideas and experiences among “volcano cities”, and promoting multi-disciplinary research and actions.
More about: citiesonvolcanoes.wordpress.com
CaV links the volcanology community with emergency managers, fostering the exchange of ideas and experiences among “volcano cities”, and promoting multi-disciplinary research and actions.
More about: citiesonvolcanoes.wordpress.com
November 5, 2025 at 6:39 PM
Get to know the IAVCEI Commission of Cities and Volcanoes (CaV) 🌋
CaV links the volcanology community with emergency managers, fostering the exchange of ideas and experiences among “volcano cities”, and promoting multi-disciplinary research and actions.
More about: citiesonvolcanoes.wordpress.com
CaV links the volcanology community with emergency managers, fostering the exchange of ideas and experiences among “volcano cities”, and promoting multi-disciplinary research and actions.
More about: citiesonvolcanoes.wordpress.com
Reposted by Marie-Claude Williamson
#Earthquakes at #MountEtna reveal magma ascent from deep to shallow crust 🌋 — variations in #bvalue track magma movement through the volcano’s plumbing system.
Check out our new study in #ScienceAdvances
www.science.org/doi/10.1126/...
@science.org
More from our Etna studies below!
Check out our new study in #ScienceAdvances
www.science.org/doi/10.1126/...
@science.org
More from our Etna studies below!
October 9, 2025 at 12:59 PM
#Earthquakes at #MountEtna reveal magma ascent from deep to shallow crust 🌋 — variations in #bvalue track magma movement through the volcano’s plumbing system.
Check out our new study in #ScienceAdvances
www.science.org/doi/10.1126/...
@science.org
More from our Etna studies below!
Check out our new study in #ScienceAdvances
www.science.org/doi/10.1126/...
@science.org
More from our Etna studies below!
Reposted by Marie-Claude Williamson
A great day at Dominica’s Boiling Lake, a hydrothermal wonder known for its bubbling surface and shifting activity, which we are closely monitoring.
November 7, 2025 at 1:38 AM
A great day at Dominica’s Boiling Lake, a hydrothermal wonder known for its bubbling surface and shifting activity, which we are closely monitoring.
Reposted by Marie-Claude Williamson
Some of the ROTTnROCK team are currently in Dominica 🇩🇲 🌋 looking at, well, hydrothermal alteration of course!
@magmatroll.bsky.social
@trwalter.bsky.social
@arianeloisel.bsky.social
@magmatroll.bsky.social
@trwalter.bsky.social
@arianeloisel.bsky.social
November 6, 2025 at 12:09 PM
Some of the ROTTnROCK team are currently in Dominica 🇩🇲 🌋 looking at, well, hydrothermal alteration of course!
@magmatroll.bsky.social
@trwalter.bsky.social
@arianeloisel.bsky.social
@magmatroll.bsky.social
@trwalter.bsky.social
@arianeloisel.bsky.social
Reposted by Marie-Claude Williamson
Too cloudy for the full moon tonight, but here's last night's almost-full moon. If I didn't have a telescope, I'd never appreciate the color differences due to the different mineral compositions. 🧪
November 5, 2025 at 11:31 PM
Too cloudy for the full moon tonight, but here's last night's almost-full moon. If I didn't have a telescope, I'd never appreciate the color differences due to the different mineral compositions. 🧪
Reposted by Marie-Claude Williamson
Always nice to find some interesting new geology to photograph. Thanks to @andybeavisphoto.bsky.social for pointing me in the right direction!
#Iceland
#Iceland
November 6, 2025 at 6:40 PM
Always nice to find some interesting new geology to photograph. Thanks to @andybeavisphoto.bsky.social for pointing me in the right direction!
#Iceland
#Iceland
Reposted by Marie-Claude Williamson
🌋Did you know that there's more volcanic activity under the waves than on land?
Find out how underwater explosions impact our planet at the WHOI Ocean Learning Hub, a free resource that's perfect for educators, students, and the ocean-curious:
go.whoi.edu/volcano
📸 via ROV Jason 2009 © #WHOI
Find out how underwater explosions impact our planet at the WHOI Ocean Learning Hub, a free resource that's perfect for educators, students, and the ocean-curious:
go.whoi.edu/volcano
📸 via ROV Jason 2009 © #WHOI
November 5, 2025 at 12:00 AM
🌋Did you know that there's more volcanic activity under the waves than on land?
Find out how underwater explosions impact our planet at the WHOI Ocean Learning Hub, a free resource that's perfect for educators, students, and the ocean-curious:
go.whoi.edu/volcano
📸 via ROV Jason 2009 © #WHOI
Find out how underwater explosions impact our planet at the WHOI Ocean Learning Hub, a free resource that's perfect for educators, students, and the ocean-curious:
go.whoi.edu/volcano
📸 via ROV Jason 2009 © #WHOI
Reposted by Marie-Claude Williamson
Excited to share the results of collaborative research in the San Juan Basin in New Mexico published today in @science.org that provides new age constraints for the Naashobito dinosaurs from New Mexico, like the giant sauropod, Alamosaurus: www.science.org/doi/10.1126/...
October 24, 2025 at 12:39 AM
Excited to share the results of collaborative research in the San Juan Basin in New Mexico published today in @science.org that provides new age constraints for the Naashobito dinosaurs from New Mexico, like the giant sauropod, Alamosaurus: www.science.org/doi/10.1126/...
Reposted by Marie-Claude Williamson
Fieldwork at Iceland’s geysers — we captured Strokkur’s eruption dynamics as polar lights lit up the sky. What a scenery! Grateful for the great collaboration with Corrado Cimarelli and the LMU team, Sasha Kostinskiy and the group from Czechia, and our team from GFZ Potsdam.
October 9, 2025 at 1:35 PM
Fieldwork at Iceland’s geysers — we captured Strokkur’s eruption dynamics as polar lights lit up the sky. What a scenery! Grateful for the great collaboration with Corrado Cimarelli and the LMU team, Sasha Kostinskiy and the group from Czechia, and our team from GFZ Potsdam.
Reposted by Marie-Claude Williamson
Palagonitised lapilli tuffs from subglacial volcano Cracked Mountain 🌋🇨🇦 line up for physical property measurements in Strasbourg! Will their properties vary as a function of distance from the dyke? 🧐
@alteringrocks.bsky.social
@alteringrocks.bsky.social
August 25, 2025 at 9:06 AM
Palagonitised lapilli tuffs from subglacial volcano Cracked Mountain 🌋🇨🇦 line up for physical property measurements in Strasbourg! Will their properties vary as a function of distance from the dyke? 🧐
@alteringrocks.bsky.social
@alteringrocks.bsky.social
Reposted by Marie-Claude Williamson
#MolluscMonday Sectioned nerineoidean gastropod from a limestone paving slab at the British Museum, London.
August 25, 2025 at 6:44 AM
#MolluscMonday Sectioned nerineoidean gastropod from a limestone paving slab at the British Museum, London.
Reposted by Marie-Claude Williamson
The latest eruption of Kilauea is underway, and she's shootin' sideways this time around!
USGS live stream: www.youtube.com/watch?v=Bqmp...
USGS live stream: www.youtube.com/watch?v=Bqmp...
August 23, 2025 at 1:25 AM
The latest eruption of Kilauea is underway, and she's shootin' sideways this time around!
USGS live stream: www.youtube.com/watch?v=Bqmp...
USGS live stream: www.youtube.com/watch?v=Bqmp...
Reposted by Marie-Claude Williamson
Reposted by Marie-Claude Williamson
Looking down over the top of some vertical basalt columns into the canyon at Stuðlagil #Iceland in April 2023.
#Geology #GeologyRocks #BasatlPorn
#Geology #GeologyRocks #BasatlPorn
August 16, 2025 at 2:08 PM
Looking down over the top of some vertical basalt columns into the canyon at Stuðlagil #Iceland in April 2023.
#Geology #GeologyRocks #BasatlPorn
#Geology #GeologyRocks #BasatlPorn
Reposted by Marie-Claude Williamson
A curious Arctic Fox pup checks out a nature photographer
July 22, 2025 at 8:54 PM
A curious Arctic Fox pup checks out a nature photographer
Reposted by Marie-Claude Williamson
HiPOD: A Landslide on Arsia Mons
Continuing a landslide theme, this observation captures terrain right at the edge of the caldera of Arsia Mons. Arsia Mons and two other volcanoes form what is known as the Tharsis Montes.
uahirise.org/hipod/ESP_07...
NASA/JPL-Caltech/University of Arizona
#Mars
Continuing a landslide theme, this observation captures terrain right at the edge of the caldera of Arsia Mons. Arsia Mons and two other volcanoes form what is known as the Tharsis Montes.
uahirise.org/hipod/ESP_07...
NASA/JPL-Caltech/University of Arizona
#Mars
July 2, 2025 at 8:04 PM
HiPOD: A Landslide on Arsia Mons
Continuing a landslide theme, this observation captures terrain right at the edge of the caldera of Arsia Mons. Arsia Mons and two other volcanoes form what is known as the Tharsis Montes.
uahirise.org/hipod/ESP_07...
NASA/JPL-Caltech/University of Arizona
#Mars
Continuing a landslide theme, this observation captures terrain right at the edge of the caldera of Arsia Mons. Arsia Mons and two other volcanoes form what is known as the Tharsis Montes.
uahirise.org/hipod/ESP_07...
NASA/JPL-Caltech/University of Arizona
#Mars