#UtrechtUniversity #EarthSystemScience #Geology
One more Friday early-career presenter at the #Goldschmidt2023 conference #Lyon:

*Alissa J Kotowski* (Utrecht University)
Low-temperature plate boundary serpentinization post-dates subduction initiation and facilitates obduction of an Appalachian ophiolite

Session 4fO2 09:30 CEST

Field work at Mont Albert, Gaspé Peninsula, #Quebec done while at #McGillUniversity. #Ordovician #TaconicOrogeny

#McGillUniversity #EarthSystemScience #Geology
Friday's early-career presenters at the #Goldschmidt2023 conference #Lyon:

*Matthew Tarling*
Deciphering the combined structural and mineralogical record of serpentinite fault rocks
Session 4fO2 09:15 CEST

*Jillian Kendrick*
Field observations, petrography, geochemistry, and phase equilibrium modelling: The four pillars of petrological investigations of crustal differentiation
Session 4dO1 11:15 CEST

#McGillUniversity #EarthSystemScience #Geology
Monday & Tuesday's early-career presenters at the #Goldschmidt2023 conference #Lyon (late notice):

*Kathryn Rico* now at Arizona State U
Combining trace metal geochemistry and experimental microbiology to explore the role of dissimilatory Fe(III) reducing bacteria in precursor Banded Iron Formations

*Maxwell Lechwe*
Palaeoredox and environmental constraints on early eukaryote ecosystems: insights from the Greater McArthur Basin, northern Australia

Excellent talk last week by Hannah Mark, now at Woods Hole on documenting thin lithosphere and low viscosities essential to model ice distribution over time in the southern Andes. Figure shows seismic velocities, with red corresponding to slow (hot) mantle. More info: https://essopenarchive.org/doi/full/10.1002/essoar.10510075.1

#McGillUniversity #WHOI #EarthSystemScience #Seismology #Lithosphere

The ground we live on is the top of a moving rock area that is really hot. The ground we live on is broken up into little rocks. Sometimes the little rocks move on top of each other. This makes the rocks get really tall. Sometimes one goes under the other one. The under rock gets really hot and becomes the moving rock under the ground. The moving rock under us sometimes comes up through the ground making new hot rock. [J. G.]
#PlateTectonics #UpGoer5 #EarthSystemScience #McGillUniversity

Another group of #EarthSystemScience #UpGoer5 Change that happens quickly and continues to grow. The growing that happens begins to happen faster and faster than it did at the start. The number of people in the world is a good way to understand this. It grows faster and faster than it did before. [K. A.]
#ExponentialGrowth #McGillUniversity

More #EarthSystemScience #UpGoer5
Trees can tell us is what the world was like in the past. The rings inside a tree can show us how much it grew each year. In wet years, the tree will grow a thick ring, and in dry years, it will grow a small ring. People can study tree rings to see how hot and cold the world has been and how it has changed over time. This is important because it helps us understand how the world is changing now and how it may change.
#Proxies #McGillUniversity #SimpleWords

Ekman spiral continued....
The deeper water does not feel the wind, but it does feel the water above moving. So the same thing happens again, except this time the water goes in a direction even further from that of the wind, and so on, turning as we go deeper. At each step, we lose a bit of force, so we have less and less as we go down.
[A. B.-K.]
[2/2]
#Ekman #UpGoer5 #McGillUniversity #SimpleWords #EarthSystemScience

Herbert Huppert gave us an entertaining and informative talk last week during the ice storm: Lava spreading and explosive activity: the eruptions of La Soufrière of St. Vincent 1979 and 2021. Not recorded, so his honey experiment recreated here before Saturday pancakes.
#KingsCollegeCambridge #McGillUniversity #EarthSystemScience #Volcanology

The view from Stac Pollaidh, Assynt, Scottish Highlands. Made of mid- to late-Proterozoic Torridonian arkose. #FieldFriday #EarthSystemScience #Scotland

Find the Ptarmigan...

These are the rocks of the Nuvvuagittuq Greenstone Belt, some of the oldest exposed supercrustal rocks in the world. There are biochemical indications of life in rocks associated with these. How many unbroken linked generations of organisms span these two ecosystems, separated by 4 billion years?
#Quebec #EarthSystemScience #BirdsOfMastodon

The Hans Hofmann Hall of the Pointe de Buisson Archeological Park, #Beauharnois (across the river and upstream from #Montreal). It contains large blocks of Cambrian Potsdam sandstone containing trace fossils. In front is the rock and a cast of Climactichnites, a slug-like mollusc feeding in the tidal zone. #FossilFriday #EarthSystemScience #McGillUniversity

Katie Maloney spoke about the 950 million year old algae fossils from the Wernecke Mountains, Yukon Territory, Canada. She's reconstructing the biosphere and the spread of eukaryotes at a time before shells or any other hard parts evolved.
#McGillUniversity #EarthSystemScience #FossilFriday #Proterozoic #Yukon

The pillow rinds have preferentially weathered, outlining the basalt pillows formed at least 3.75 and perhaps as long ago as 4.3 billion years ago. Now metamorphosed to amphibolite grade. In the Ujaraaluk unit of the Nuvvuagittuq Greenstone Belt, near #Inukjuak, northern #Quebec. #McGill University #EarthSystemScience #PillowBasalt #Hadean 1/2

Thank you Ananya Mallik (@DrRockChef), the MSA Distinguished Lecturer, for a great visit today, speaking on: "How hot and wet is the Moon? Insights and challenges"

#UArizona #McGillUniversity #EarthSystemScience #Moon #ExperimentalPetrology

The reflection #GNSS publication, for more information:
Purnell, David J.; Gomez, Natalya; Minarik, William; Porter, David; Langston, Gregory (2021)
Precise water level measurements using low-cost GNSS antenna arrays. Earth Surface Dynamics Vol. 9 Issue 3, pp. 673–685

@natalyagomez #McGillUniversity #EarthSystemScience

A more compact setup developed by Dave and Greg, and the comparison of reflection #GNSS based water levels to a government co-located tide gauge at the Port of Trois Rivieres. With @natalyagomez #McGillUniversity #EarthSystemScience

Please share this unique job opportunity:
Are you passionate about student participation in the Earth Sciences and #scienceoutreach and interested in #EarthScience? The Earth and Planetary Sciences Department at McGill is hiring a full-time Communications Administrator. Application deadline now 14 February. Earth Sci background an asset but not required; must be fluent in French and English
#McGillUniversity #Montreal #EarthSystemScience #Geology

https://mcgill.wd3.myworkdayjobs.com/McGill_Careers/job/Adams-Building/Communications-Administrator_JR0000036783

Testing field equipment, pre-COVID. We use the interference between the direct and the reflected #GNSS signal as the satellites orbit to find the height of the water level reflector. Four receivers average random noise, and the SNR is recorded on a #RaspberryPi Zero. With @natalyagomez, D. Purnell, and G. Langston. #McGillUniversity #EarthSystemScience

RT @IlanKelman
"#PlanetaryBoundaries: A Framework against #Geodynamics?"
https://blogs.egu.eu/divisions/gd/2023/01/25/planetary-boundaries-a-framework-against-geodynamics

Thanks to @EGU_GD @EuroGeosciences @lydia_theo1

#ClimateTwitter #EMGTwitter #DRRTwitter #Sustainability #GlobalGoals #SDG #SDGs #Climate #ClimateChange #EarthSystems #EarthSystemScience #DRR https://twitter.com/EGU_GD/status/1618336154646085633