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Chris K @geochronchris.bsky.social · 28/06/2026

How old is the North Pole Dome impact in WA? In doi.org/10.1130/G548..., we date lightning-bolt-like skeletal zircon in shocked rocks and hydrothermal apatite, giving an age of ~3.02 billion years. North Pole Dome is a candidate for Earth’s oldest known impact structure. #geology

backscatter electron image of 3 billion year old skeletal zircon from North Pole Pilbara

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Chris K @geochronchris.bsky.social · 03/09/2025

New OA paper: niobium-rich carbonatites in Australia formed ~830 Million years ago as Rodinia rifted. Multi-method geochronology + isotopes trace mantle melts funneled up long-lived faults = insights for Nb/REE exploration. doi.org/10.1017/S0016756825100204 #Niobium #Geology #CriticalMinerals

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Chris K @geochronchris.bsky.social · 27/08/2025

Reviewing Earth’s earliest continental crust; exploring how internal tectonics and possible external forces, from impacts to astrophysical cycles, shaped the continents that underpin habitability. Read here: doi.org/10.1038/s430... #Geology #DeepTime

Cartoon earth, galaxy, and a meteorite on sky background

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Chris K @geochronchris.bsky.social · 14/08/2025

Earth’s energy switch recorded in mineral grains New research suggests Earth’s early crust stopped being powered mainly by giant asteroid impacts and started running on its own internal heat about 3.9 billion years ago. doi.org/10.1038/s432... #Geology #CurtinUniversity #EarlyEarth

Cartoon of ancient Earth with impact processes

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Chris K @geochronchris.bsky.social · 29/04/2025

New research shows a meteorite struck Scotland 1 billion years ago, close in time to some of Earth's earliest land fossils. A rare glimpse into how ancient ecosystems responded to cosmic disruption. 🔗 theconversation.com/1-billion-ye... #Geology #Meteorite #Fossils #Science

theconversation.com

1 billion years ago, a meteorite struck Scotland and influenced life on Earth

The microbes living here were dramatically disrupted – and the future of life on Earth changed.

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Chris K @geochronchris.bsky.social · 20/04/2025

Check out this incredible cave system in the Tamala Limestone on Rottnest Island; sculpted by rhizoliths (fossilised root structures) and now a perfect hideout for Sand Tiger Sharks. WA’s geology rocks! More on Rotto’s geology here: doi.org/10.1111/bre....

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Chris K @geochronchris.bsky.social · 16/04/2025

Sand… deceptively simple, endlessly fascinating. Through geochronology and isotope fingerprinting, even a handful of beach sand can tell the story of mountains rising, continents colliding, and ancient rocks eroding. A whole world in a grain of sand. doi.org/10.1144/jgs2...

zircon grains and map of UK used in sand geochronology study

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Chris K @geochronchris.bsky.social · 12/04/2025

Just had a great visit to @UniofAdelaide where I had the chance to present on crustal evolution and impact processes, representing C-FIGS at Curtin. Really valuable discussions with the Earth Sciences team. #CFIGS #CurtinGeology #GeoscienceCollaboration #timescales

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Chris K @geochronchris.bsky.social · 06/04/2025

Lead isotopes for #geology. Very handy for understanding igneous rocks - brace of recent open access contributions: doi.org/10.1016/j.li... doi.org/10.1093/petr... doi.org/10.1016/j.gs...

doi.org

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Reposted by Chris K

Timescales of Mineral Systems Group, EPS, Curtin University @timescaleseps.bsky.social · 05/04/2025

Shoutout to Priyanjan Datta for the 1st paper of his #PhD in #Lithos linking granite Pb-isotope signatures to intracrustal fractionation, crustal thickness, and the evolution of the Delamerian & Lachlan Fold Belt. With @geochronchris.bsky.social, JdLC, GA et al. doi.org/10.1016/j.li...

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Chris K @geochronchris.bsky.social · 20/03/2025

Do you want to go back in time and research ancient geology and understand mineral systems and tectonics? Do you like field and lab work? Come do a PhD with us at Curtin University: www.earthworks-jobs.com/geoscience/c...

earthworks-jobs.com

Jobs in Geoscience : Earthworks : 2 x PhD Opportunities - Tectonic Evolution and Geochronology of the Yilgarn Craton - Perth, Australia - Curtin University <div id="title">2 x PhD Opportunities - Tect...

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Chris K @geochronchris.bsky.social · 17/03/2025

Great chat with Bob McDonald on CBC. It's great to be able to share the deep time history preserved in Western Australia. www-cbc-ca.cdn.ampproject.org/c/s/www.cbc....

www-cbc-ca.cdn.ampproject.org

Mar 15: The silent, long-term effects of COVID, and more...

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Chris K @geochronchris.bsky.social · 10/03/2025

Rocks from 700 million years ago hold the clues. From glaciers bulldozing landscapes to meltwater rivers flushing chemical elements into the oceans = it’s a story of how land, sea, and sky are all geochemically connected. theconversation.com/giant-glacie...

theconversation.com

Giant glaciers pulverised Earth’s ancient rocks, setting the stage for complex life

Hundreds of millions of years ago, rocks crushed under kilometres of ice injected vital nutrients into Earth’s oceans.

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