Tim Johnson
@earlyearthtim.bsky.social
Geologist at Curtin Uni. Lover of old rocks and cricket. Tories, not so much...
Lovely stuff this. Go Curtin!
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
#Niobium #Geology #CriticalMinerals
September 3, 2025 at 4:47 AM
Lovely stuff this. Go Curtin!
Another paper that has been a huge fight, but a good outcome in the end. Boom!
pubs.geoscienceworld.org/gsa/geology/...
#geology #meteorite #this_one_is_not_a_crater
pubs.geoscienceworld.org/gsa/geology/...
#geology #meteorite #this_one_is_not_a_crater
A one-billion-year-old Scottish meteorite impact | Geology | GeoScienceWorld
pubs.geoscienceworld.org
May 2, 2025 at 10:11 AM
Another paper that has been a huge fight, but a good outcome in the end. Boom!
pubs.geoscienceworld.org/gsa/geology/...
#geology #meteorite #this_one_is_not_a_crater
pubs.geoscienceworld.org/gsa/geology/...
#geology #meteorite #this_one_is_not_a_crater
If anybody would like to read our @nature.com paper "Formation and composition of Earth’s Hadean protocrust", led by Simon Turner, you can do so here...
rdcu.be/ef9MB
#geology #science #early_earth #impacts
rdcu.be/ef9MB
#geology #science #early_earth #impacts
Formation and composition of Earth’s Hadean protocrust
Nature - A modelling study shows that the trace-element composition of Earth’s Hadean protocrust is similar to that of the current average continental crust, severely compromising geochemical...
rdcu.be
April 3, 2025 at 9:42 AM
If anybody would like to read our @nature.com paper "Formation and composition of Earth’s Hadean protocrust", led by Simon Turner, you can do so here...
rdcu.be/ef9MB
#geology #science #early_earth #impacts
rdcu.be/ef9MB
#geology #science #early_earth #impacts
Reposted by Tim Johnson
#Collab with the Geological Survey of WA we have 2 fully funded #PhD positions available looking at the "Tectonic Evolution and Geochronology of the Yilgarn Craton" a world famous mineral endowed classic.
www.earthworks-jobs.com/geoscience/c...
@geochronchris.bsky.social @bribeiro.bsky.social
www.earthworks-jobs.com/geoscience/c...
@geochronchris.bsky.social @bribeiro.bsky.social
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...
www.earthworks-jobs.com
March 20, 2025 at 2:19 PM
#Collab with the Geological Survey of WA we have 2 fully funded #PhD positions available looking at the "Tectonic Evolution and Geochronology of the Yilgarn Craton" a world famous mineral endowed classic.
www.earthworks-jobs.com/geoscience/c...
@geochronchris.bsky.social @bribeiro.bsky.social
www.earthworks-jobs.com/geoscience/c...
@geochronchris.bsky.social @bribeiro.bsky.social
Reposted by Tim Johnson
Fun, indeed. Having been to North Pole, and the Pilbara more generally (long ago) - I was v keen to hear detail about the idea it had been massively whacked by an extraterrestrial bolide 3.5 bn years ago.
Fun interview with @peaseroland.bsky.social from the BBC on the North Pole crater (beginning ~20 minutes in)…
www.bbc.co.uk/sounds/play/...
www.bbc.co.uk/sounds/play/...
Science In Action - New warnings, familiar faces, and radio pulses - BBC Sounds
WHO pandemic call, an H5N1 call to arms from global health leaders.
www.bbc.co.uk
March 17, 2025 at 5:04 PM
Fun, indeed. Having been to North Pole, and the Pilbara more generally (long ago) - I was v keen to hear detail about the idea it had been massively whacked by an extraterrestrial bolide 3.5 bn years ago.
Fun interview with @peaseroland.bsky.social from the BBC on the North Pole crater (beginning ~20 minutes in)…
www.bbc.co.uk/sounds/play/...
www.bbc.co.uk/sounds/play/...
Science In Action - New warnings, familiar faces, and radio pulses - BBC Sounds
WHO pandemic call, an H5N1 call to arms from global health leaders.
www.bbc.co.uk
March 15, 2025 at 2:19 AM
Fun interview with @peaseroland.bsky.social from the BBC on the North Pole crater (beginning ~20 minutes in)…
www.bbc.co.uk/sounds/play/...
www.bbc.co.uk/sounds/play/...
Excellent chat!
I met with Tim Johnson and Chris Kirkland to talk about their discovery of a Paleoarchean (3.47 billion years) impact site in the Pilbara Craton in Australia, which makes is the oldest known impact site on Earth.
link to video youtu.be/hi4hDVyO8hs?...
link to study www.nature.com/articles/s41...
link to video youtu.be/hi4hDVyO8hs?...
link to study www.nature.com/articles/s41...
3.47 billion year old impact site discovered in Australia
YouTube video by Geo-log
youtu.be
March 12, 2025 at 12:18 PM
Excellent chat!
Reposted by Tim Johnson
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...
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.
theconversation.com
March 10, 2025 at 12:56 AM
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...
Regarding our recent paper…
rdcu.be/ecqYe
…look at these lovely shatter cones in 3D. Lovely stuff…
sketchfab.com/3d-models/sh...
rdcu.be/ecqYe
…look at these lovely shatter cones in 3D. Lovely stuff…
sketchfab.com/3d-models/sh...
Shatter cone 2 - 3D model by Tim Johnson (@wonkiergruff)
Shatter cone 2 - 3D model by Tim Johnson (@wonkiergruff)
sketchfab.com
March 6, 2025 at 12:54 PM
Regarding our recent paper…
rdcu.be/ecqYe
…look at these lovely shatter cones in 3D. Lovely stuff…
sketchfab.com/3d-models/sh...
rdcu.be/ecqYe
…look at these lovely shatter cones in 3D. Lovely stuff…
sketchfab.com/3d-models/sh...