Tim Johnson @earlyearthtim.bsky.social · 02/05/2025Another 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_craterpubs.geoscienceworld.orgA one-billion-year-old Scottish meteorite impact | Geology | GeoScienceWorld 030
Tim Johnson @earlyearthtim.bsky.social · 03/04/2025If 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 #impactsrdcu.beFormation and composition of Earth’s Hadean protocrustNature - 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... 0153
Reposted by Tim JohnsonTimescales of Mineral Systems Group, EPS, Curtin University @timescaleseps.bsky.social · 20/03/2025#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.socialearthworks-jobs.comJobs 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... 064
Reposted by Tim JohnsonRoland Pease @peaseroland.bsky.social · 17/03/2025Fun, 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. 041
Tim Johnson @earlyearthtim.bsky.social · 15/03/2025Fun interview with @peaseroland.bsky.social from the BBC on the North Pole crater (beginning ~20 minutes in)… www.bbc.co.uk/sounds/play/...bbc.co.ukScience In Action - New warnings, familiar faces, and radio pulses - BBC SoundsWHO pandemic call, an H5N1 call to arms from global health leaders. 030
Reposted by Tim JohnsonChris K @geochronchris.bsky.social · 10/03/2025Rocks 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.comGiant glaciers pulverised Earth’s ancient rocks, setting the stage for complex lifeHundreds of millions of years ago, rocks crushed under kilometres of ice injected vital nutrients into Earth’s oceans. 034
Tim Johnson @earlyearthtim.bsky.social · 06/03/2025Regarding our recent paper… rdcu.be/ecqYe …look at these lovely shatter cones in 3D. Lovely stuff… sketchfab.com/3d-models/sh...sketchfab.comShatter cone 2 - 3D model by Tim Johnson (@wonkiergruff)Shatter cone 2 - 3D model by Tim Johnson (@wonkiergruff) 221
Tim Johnson @earlyearthtim.bsky.social · 06/03/2025Boom theconversation.com/earths-oldes...theconversation.comEarth’s oldest impact crater was just found in Australia – exactly where geologists hoped it would beThe crater dates back 3.5 billion years, making it the oldest known by more than a billion years. 26017
