Dawid Szymanowski
@sdawid.bsky.social
Geochronology researcher at ETH Zurich. 🧪
Pretty cool and dramatic NASA animation showing the long-range transport of 2026 Canadian wildfire smoke.
⚒️ Article: Fern savannahs especially susceptible to wildfires spread rapidly following the collapse of forest ecosystem during the end-Triassic mass extinction www.nature.com/articles/s41...
Continental-scale fern savannah wildfires during end-Triassic greenhouse warming - Nature Geoscience
Fern savannahs spread rapidly following the collapse of the forest ecosystem during the end-Triassic mass extinction, setting the conditions for widespread wildfires, according to an analysis of the d...
nature.com
The origin of Cretaceous-Palaeogene impactor revealed by nickel isotopes | Science Advances www.science.org/doi/10.1126/...
The origin of Cretaceous-Palaeogene impactor revealed by nickel isotopes
A relatively volatile-poor asteroid from the outer Solar System was responsible for the extinction of non-avian dinosaurs.
science.org
Happy birthday to Zofia Kielan-Jaworowska (1925-2015) a Polish #paleobiologist, famous for a series of Polish-Mongolian expeditions she lead from 1963-1971 to the Gobi desert! 🧪🐡👩🏼🔬 #histsci There she discovered dinosaurs including the Deinocheirus, plus she & team found the “Fighting Dinosaurs”
Plate tectonics created the Earth as we know it. Australian zircons some 4 billion years old suggest that mantle convection was established in the Hadean Eon and signs of large-scale plate underthrusting appear in the Archean Eon. In PNAS: https://ow.ly/1cBe50Yq7sX
The Institute of Geochemistry and Petrology at ETH Zurich is looking for a Senior Scientist / Lab Manager in Spectroscopy for High Pressure/Temperature Experiments to maintain and develop the spectroscopic and part of the experimental equipment in our labs. #jobalert www.jobs.ethz.ch/job/view/11375
Senior Scientist / Lab Manager in Spectroscopy for High Pressure/Temperature Experiments
jobs.ethz.ch
When Neanderthals and ancient modern humans interbred, the pairings were mostly between male Neanderthals and female humans, according to a new Science study. This finding helps explain why Neanderthal ancestry present in most humans is unevenly distributed. https://scim.ag/4cQYpIL
Interbreeding between Neanderthals and modern humans was strongly sex biased
Sex biases in admixture and other demographic processes are recurrent features throughout human evolution. For admixture between Neanderthals and anatomically modern humans (AMHs), sex bias has been p...
scim.ag
The Volcanology and Magmatic Petrology group at ETH Zurich is looking for a Postdoctoral Fellow in Volcanology and Magmatic Processes to develop and lead an independent research programme in magmatic petrology, volcanology, and/or geochronology. #postdoc #jobalert www.jobs.ethz.ch/job/view/11402
Postdoctoral Fellow in Volcanology and Magmatic Processes
jobs.ethz.ch
This is nice! A new surface dating tool using cosmogenic crypton in zircons. What's not to love!? 🌌💥🪨🏞️
A 'cosmic clock' in tiny crystals reveals the rise and fall of Australia's ancient landscapes
Australia's iconic red landscapes have been home to Aboriginal culture and recorded in songlines for tens of thousands of years. But further clues to just how ancient this landscape is come from far b...
phys.org
A new analysis of fossils uncovered in Central Africa offers additional evidence that a human ancestor walked upright 7 million years ago, pushing back the date at which early hominins stood tall by about a million years.
When did humanity take its first step? Scientists say they now know.
A new analysis of fossils uncovered in Central Africa offers additional evidence that a human ancestor walked upright 7 million years ago.
washingtonpost.com
Happy to share the long-awaited results of our community experiment comparing high-precision ID-TIMS U-Pb lab performance🧪⚒️ We do pretty well but as ever there is room for improvement 🤓 Stay tuned! doi.org/10.5194/gchr...
Interlaboratory reproducibility of ID-TIMS U–Pb geochronology evaluated with a pre-spiked natural zircon solution
Abstract. The highest precision and accuracy in U–Pb geochronology is achieved using isotope dilution thermal ionisation mass spectrometry (ID-TIMS), a technique which owes its reliability to precise ...
doi.org
Interesting new Rb-Sr data and summary of the chronology of #Moon formation 🧪⚒️ tinyurl.com/2ztta42d
The age and early evolution of the Moon revealed by the Rb-Sr systematics of lunar ferroan anorthosites
The formation of the Moon by a giant impact of an object called Theia onto proto-Earth marks the end of the main stage of Earth’s accretion. However, …
tinyurl.com
An unexpected discovery of IODP Exp 398! 200 m of ash from the Kos Plateau Tuff eruption buried in the basins around Santorini, read how it got there in our new paper in Science Advances 🌋 www.science.org/doi/10.1126/...
Submarine ash megabed fed by far-traveled, shoreline-crossing pyroclastic currents from a large explosive volcanic eruption
Volcanic ash from an eruption in Greece poured into the sea, forming a bed 200 m thick in a submarine basin far from the volcano.
science.org
The Nuvvuagittuq Greenstone Belt— a complex geological sequence in northeastern Canada—harbors surviving fragments of Earth’s oldest crust, dating back to ~4.16 billion years old, according to a new Science study. Learn more: scim.ag/3FXN8sq
Evidence for Hadean mafic intrusions in the Nuvvuagittuq Greenstone Belt, Canada
Many questions remain regarding Earth’s earliest crust owing to the rarity of Hadean (>4.03 billion-year-old) rocks and minerals. The Nuvvuagittuq Greenstone Belt (NGB) in Canada may be the only known...
scim.ag
1456, the Duke of Milan established a medical institution dedicated to caring for the city’s poor and sick on a scale unprecedented in Europe. Admission was based on lack of income, not religious affiliation. It was the first secular hospital in Europe.. 🧪 www.science.org/content/arti...
Thousands buried in 17th century Italian crypt reveal lives of working poor
Remains recovered from beneath a Milan hospital shed light on health, diet, and drug habits during the 1600s
science.org
New study in GChron led by Chetan Nathwani - looking at what controls the shape of #zircon U-Pb date distributions in magmatic rocks and what meaningful info they can provide ⚒️🧪 gchron.copernicus.org/articles/7/1...
Controls on zircon age distributions in volcanic, porphyry and plutonic rocks
Abstract. The distribution of zircon crystallisation ages in igneous rocks has been proposed to provide insights into the dynamics of underlying magma reservoirs. However, the ability to interpret mag...
gchron.copernicus.org
#postdoc (or #phd) #jobalert The Experimental Planetology research group at @ethzurich.bsky.social is offering a Postdoc in Experimental Geochemistry and on the determination of liquid iron alloy densities with application to the Moon's and other planets core.
Postdoc (or PhD) position in Experimental Geochemistry
The Experimental Planetology Group of the Department of Earth and Planetary Sciences (D-EAPS) invites applications for a 2-yr post-doctoral position on the experimental determination of liquid iron…
jobs.ethz.ch
Cave folks - here some must-read for your weekend! 😛#speleothem, #caves, #volcano, #climate - what else you want?! 👇 @pucicu.de @olakwiecien3.bsky.social @cavesandclimate.bsky.social
Sophie Warken@swinnyy.bsky.social · 2y agoExcited to share our latest research published in @science.org #ScienceAdvances! 🎉 We've discovered the Laacher See eruption 🌋 in a speleothem from Germany, which allows to synchronize European and Greenland Late Glacial climate change. Read more: www.science.org/doi/10.1126/... A Thread ⬇️⬇️ 1/n
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Dawid Szymanowski@sdawid.bsky.social · 2y agoNew study in PNAS: Apollo samples reveal that KREEP, the magma left after the #Moon was >99% solidified, formed 4.43 billion years ago. 🌘 This implies the Moon was born no later than ca. 140 My after the solar system’s birth. 🧪 ⚒️ @eth-eaps.bsky.social www.pnas.org/doi/10.1073/...
New study in PNAS: Apollo samples reveal that KREEP, the magma left after the #Moon was >99% solidified, formed 4.43 billion years ago. 🌘 This implies the Moon was born no later than ca. 140 My after the solar system’s birth. 🧪 ⚒️ @eth-eaps.bsky.social www.pnas.org/doi/10.1073/...
pnas.org
So how small are the zircons that we date in the lab? Here's a Fish Canyon Tuff zircon on a $5 bill for comparison!
Clever composite photo lets you see a side of the universe normally hidden to human vision. A camera tuned to hydrogen-alpha light reveals glorious interstellar clouds swirling around the familiar stars of the constellation Orion. (Photo: Włodzimierz Bubak) 🔭🧪 apod.nasa.gov/apod/ap24122...
