#jackhills — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #jackhills, aggregated by home.social.
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Mineral Monday: Mobile- and Stagnant-lid Tectonics on the Hadean Earth Continents and recycled crust via subduction may have formed earlier than previously thought. (Valley JW, et al 2026: doi.org/10.1038/s415.... By John Valley #MSACommunications #MineralMonday #mineral #zircon #Hadean #JackHills
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Mineral Monday: Mobile- and Stagnant-lid Tectonics on the Hadean Earth Continents and recycled crust via subduction may have formed earlier than previously thought. (Valley JW, et al 2026: doi.org/10.1038/s415.... By John Valley #MSACommunications #MineralMonday #mineral #zircon #Hadean #JackHills
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Mineral Monday: Mobile- and Stagnant-lid Tectonics on the Hadean Earth Continents and recycled crust via subduction may have formed earlier than previously thought. (Valley JW, et al 2026: doi.org/10.1038/s415.... By John Valley #MSACommunications #MineralMonday #mineral #zircon #Hadean #JackHills
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Mineral Monday: Mobile- and Stagnant-lid Tectonics on the Hadean Earth Continents and recycled crust via subduction may have formed earlier than previously thought. (Valley JW, et al 2026: doi.org/10.1038/s415.... By John Valley #MSACommunications #MineralMonday #mineral #zircon #Hadean #JackHills
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The expression “Old as the hills” means really, really old when you’re referring to #JackHills in Western Australia.
How old are they? They’re so old that isotopic analysis of zircon rocks 🪨 found there indicate that they were formed BEFORE tectonic activity on Earth 🌏 began! 👉 https://www.si.edu/newsdesk/releases/earths-oldest-minerals-date-onset-plate-tectonics-36-billion-years-ago
This fascinating result of #geochemistry agrees with the second oldest rocks on Earth from the Canadian Shield.