#geochronology — Public Fediverse posts

2,000-year-old Vesuvius eruption that buried Pompeii helps scientists date Earth’s history more precisely

A new study has made argon-argon dating more precise by using the well-recorded eruption of Mount Vesuvius in 79 CE. The eruption buried Pompeii and killed Pliny the Elder. His nephew, Pliny the Younger, witnessed the event and recorded a detailed account...

More information: https://archaeologymag.com/2026/09/vesuvius-eruption-helps-scientists-date-earths-history/

Follow @archaeology

#archaeology #archaeologynews #geochronology #pompeii #vesuvius

The eruption that buried Pompeii is helping scientists synchronize Earth’s geological clocks

Scientists used the precisely recorded 79 CE eruption of …
#NewsBeep #News #Science #archeology #argon-argondating #AU #Australia #BerkeleyGeochronologyCenter #geochronology #Geology #MountVesuvius #NewDiscoveries #PaulRenne #PlinytheYounger #pompeii #potassium-40 #RadiocarbonDating #radiometricdating #research #sanidine #UCBerkeley #volcaniceruptions #volcanichazards
https://www.newsbeep.com/au/907984/

https://www.europesays.com/ie/709232/ The eruption that buried Pompeii is helping scientists synchronize Earth’s geological clocks #Archeology #ArgonArgonDating #BerkeleyGeochronologyCenter #Éire #geochronology #Geology #IE #Ireland #MountVesuvius #NewDiscoveries #PaulRenne #PlinyTheYounger #Pompeii #Potassium40 #RadiocarbonDating #RadiometricDating #Research #sanidine #Science #UCBerkeley #VolcanicEruptions #VolcanicHazards

Vote #Monazite: the phosphate with the most-est for #MinCup26 ⚒️🧪
* Hangs out on beaches
* Source of rare earths for your phones and earbuds
* Tracks time (a sophisticated #geochronology mineral)
* Has a fascinating crystal structure
* Generously isostructual with cheralite, brabanite and huttonite
* Beautiful shades of yellow & orange
* Has a street named after it (Mount Garnet, Queensland 🇦🇺 )

Eonothem (Geology terminology ⛰️)

In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific number of years, ...

https://en.wikipedia.org/wiki/Eonothem

#Eonothem #Geochronology #GeologicalEons #GeologicalUnits #Chronostratigraphy #GeologicTimeScales

Researchers have successfully established the precise age of the oldest known asteroid impact crater on Earth, dating the event at the North Pole Dome in Western Australia to approximately 3 billion years ago.
#EarthScience #Geochronology #PlanetaryScience #sflorg
https://www.sflorg.com/2026/06/es06242601.html

Earth’s oldest crater really is over 3 billion years old, new study confirms https://theconversation.com/earths-oldest-crater-really-is-over-3-billion-years-old-new-study-confirms-283696 #geology #geochronology #science #STEM

System (stratigraphy) (Geological periods 🌍)

A system in stratigraphy is a sequence of strata that were laid down together within the same corresponding geological period. The associated period is a chronological time unit, a part of the geological time scale, while the system is a unit of chronostratigraphy. Systems are unrelated to lithostratigraphy, whic...

https://en.wikipedia.org/wiki/System_(stratigraphy)

#System #Erathems #Stratigraphy #Geochronology #GeologicalUnits #GeologicalPeriods

The hyperarid core of the Atacama Desert in Chile established its extreme dryness approximately 45 million years ago. This establishes it as one of the longest continuously dry terrestrial environments on Earth.
#Paleoclimatology #Geochronology #Geology #sflorg
https://www.sflorg.com/2026/06/es06062601.html

🏛️ New HybridMind42 paper now staged:
“The Anchor Regime: Deep-Time

Persistence and Boundary Integrity in the U-238 → Pb-206 Decay Series”

Phase 5 extends the Boundary-Filtered Persistence Framework (BFPF) into radioactive decay systems and geological timescales.

Key themes: • secular equilibrium as synchronized transformation • radon escape as boundary breach • persistence through evolving containment • radiation damage vs thermal annealing • disequilibrium as permeability data

Core concept: Persistence is maintained, not preserved.

This paper bridges: nuclear physics ↔ material science ↔ long-timescale persistence systems.

https://open.substack.com/pub/hybridmind42/p/hybridmind42-boundary-dynamics-series-9d4?utm_source=share&utm_medium=android&r=75c2ac

#NuclearPhysics #Geochronology #ComplexSystems #BFPF #BoundaryDynamics #HybridMind42 #Physics #SystemsThinking

#WeekendReading: Tangunan et al.'s short but insightful piece on the uncertainties behind Earth’s timelines.

Link: https://pastglobalchanges.org/publications/pages-magazines/pages-magazine/138913

#EarthSci #Stratigraphy #Geochronology

Early humans (Homo sapiens) in Paleolithic South Africa deliberately sought out and systematically quarried geological formations for tool-making materials as early as 220,000 years ago.
#Archaeology #Paleoanthropology #Geochronology #QuaternaryEcology #sflorg
https://www.sflorg.com/2026/04/arch04092601.html

The New Glacial Geomorphological Map From New Zealand [2021]
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https://blogs.egu.eu/divisions/cr/2021/04/02/new-zealand-geomorphology-glaciers/ <-- shared (2021) technical article/blog, Cryospheric Sciences (CR) Division, @European Geosciences Union
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https://doi.org/10.1080/17445647.2021.1876777 <-- shared (2020) paper
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#GIS #spatial #mapping #NewZealand #geomorphology #NewZealand #SouthernAlps #Quaternary #glaciation #landscape #hydrogeomorphology #water #ice #sediment #glacier #glacial #cryosphere #spatialanalysis #geology #Ahuriri #AhuririRiver #paleolake #WaitakiRiver #basin #remotesensing #postglacial #moraine #glaciology #cryosphere #processes #morphology #LastGlacialMaximum #geochronology

New research applies uranium-thorium dating to 19th-century coral cottages in French Polynesia, revealing construction timelines for Polynesian homes that colonial records largely ignored. #Archaeology #PacificHistory #Geochronology @antiquity.ac.uk https://www.anthropology.net/p/coral-walls-uranium-clocks-and-the

Why is AAR (Amino Acid Racemisation; by implication #palaeoproteomics) so often overlooked for #geochronology? New paper by @[email protected], using Bithynia snails 🐌 to date the last 1Ma: 4 new reference sets for climate & Quaternary Science 🌍 open-research-europe.ec.europa.eu/articles/5-396

History of Earth (Earth 🌍)

The natural history of Earth concerns the development of planet Earth from its formation to the present day. Nearly all branches of natural science have contributed to understanding of the main events of Earth's past, characterized by constant geological change and biological evolution. The geological time scale, as defined by inte...

https://en.wikipedia.org/wiki/History_of_Earth

#HistoryOfEarth #Earth #WorldHistory #Geochronology #GeologyTheories #CitationOverkill

Ancient rocks reveal critical metal origin and continent-breaking forces

Researchers found that newly discovered niobium-rich carbonatites were formed more than 800 million years ago – rising from deep within the Earth through fractures of the crust during a tectonic rifting event that ultimately tore apart the supercontinent known as Rodinia: www.uni-goettingen.de/en/3240.html?id=7909

Research in #GeologicalMagazine: https://doi.org/10.1017/S0016756825100204

#Geoscience #Isotopes #Geochronology

Series (stratigraphy) (Geology terminology ⛰️)

Series are subdivisions of rock layers based on the age of the rock and formally defined by international conventions of the geological timescale. A series is therefore a sequence of strata defining a chronostratigraphic unit. Series are subdivisions of systems and are themselves divided into sta...

https://en.wikipedia.org/wiki/Series_(stratigraphy)

#Series #Geochronology #GeologicalUnits #GeologicalEpochs #Chronostratigraphy #GeologicTimeScales

#Sanidine from the Fish Canyon Tuff is essential to understanding the pace of events in the #Cenozoic

High potassium, quickly erupted and cooled, and old enough to have accumulated sufficient 40Ar from radioactive decay. These crystals calibrate neutron flux for 40Ar/39Ar dating. The 28.2 Ma age of the FCT sanidine has been fine-tuned using #Milankovitch cycles of other ash beds in stable sedimentary basins.

photo from MinDat.org by Dan Polhemus

#MinCup25 #Geochronology #DeepTime #Colorado

History of life (Paleontology 🦕)

The history of life on Earth traces the processes by which living and extinct organisms evolved, from the earliest emergence of life to the present day. Earth formed about 4.5 billion years ago and evidence suggests that life emerged prior to 3.7 Ga. The similarities among all known present-day species indicate that they have diverge...

https://en.wikipedia.org/wiki/History_of_life

#HistoryOfLife #Paleontology #EarthSciences #Geochronology #EvolutionaryBiology

Erathem (Geology terminology ⛰️)

In stratigraphy, paleontology, geology, and geobiology, an erathem is the total stratigraphic unit deposited during a certain corresponding span of time during an era in the geologic timescale. It can therefore be used as a chronostratigraphic unit of time which delineates a large span of years – less than a geological eon, but greater than ...

https://en.wikipedia.org/wiki/Erathem

#Erathem #Erathems #Stratigraphy #Geochronology #GeologicalEras #Paleogeography

Çatalhöyük ‘Map’ Mural May Depict Volcanic Eruption 8,900 Years Ago
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https://www.sci.news/archaeology/science-catalhoyuk-map-mural-volcanic-eruption-01681.html <-- shared technical article
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https://doi.org/10.1371/journal.pone.0084711 <-- shared paper
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https://www.bbc.com/audio/play/p09y1ym0 <-- shared BBC podcast ‘You're Dead to Me’ on Çatalhöyük
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#GIS #spatial #mapping #cartography #history #ancienthistory #Neolithic #geology #volcanic #vulcanism #MountHasan #HasanDagi #Turkey #prehistory #prehistoric #archaeology #engineeringeology #map #ancientmap #eruption #mural #artwork #village #Çatalhöyük #Catalhoyuk #obsidian #tools #knapping #dating #geochronology #volcanicrock #age

Geochronology supports LGM age for human tracks at White Sands, New Mexico

https://www.science.org/doi/10.1126/sciadv.adv4951

#HackerNews #Geochronology #LGM #WhiteSands #HumanTracks #NewMexico #ScienceNews

Stage (stratigraphy) (Geology terminology ⛰️)

In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries. Rock series are divided...

https://en.wikipedia.org/wiki/Stage_(stratigraphy)

#Stage #UnitsOfTime #Paleobiology #Geochronology #GeologicalAges #Paleogeography

Come and join me and work in beautiful #Sydney.

We have a new 3-yr research manager #job the #UNSW Micardas radiocarbon lab. Open to Australian citizens only. #Geochronology experience recommended.

#academia

https://external-careers.jobs.unsw.edu.au/en/job/532080/research-manager-ncris-radiocarbon

SciTech Chronicles. . . . . . . . .Feb 21st, 2025

https://bit.ly/stc022125

#"Younger Dryas" #Laacher #sulfate #geochronology #recycle #nitrification #pH #f-NBD #thermoelectric #ingots #doped #efficient ##superbugs #co-scientist #antibiotics #immune #Fetal #acetaminophen #plasma #CANDLE

Stage (stratigraphy) (Geology terminology ⛰️)

In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries. Rock series are divided...

https://en.wikipedia.org/wiki/Stage_(stratigraphy)

#Stage #UnitsOfTime #Paleobiology #Geochronology #GeologicalAges #Paleogeography

Last week's top hike was from Grosse Scheidegg to Rosenlaui in the Central Swiss Alps.

This thought crossed my mind: I walked here first in the summer of 1965, as a 10 year old.

Longterm exhumation in the area is ca 0.5 mm/a. Add another 0.5 mm/a post glacial rebound since the last ice age, and you have a total uplift of 1.0 mm/a.

Since the time that I walked here first 60 years ago, all these mountains have become 6 cm taller!

A sobering thought...

#Geochronology #Thermochronology

I am delighted to announce that I am involved in the launch of a new scientific journal dedicated to the field of timescales research for the Earth Sciences:

Geochronology, Thermochronology and Time Scale Research.

This project is the initiative of ScilightPress Pty, Ltd., a young publishing house based in Melbourne, Australia. For more information about the journal please visit:
https://sciltp.com/journals/gttsr
or contact us at [email protected]
#EarthSciences #geochronology

Eonothem (Geology terminology ⛰️)

In stratigraphy and geology, an eonothem is the totality of rock strata laid down in the stratigraphic record deposited during a certain eon of the continuous geologic timescale. The eonothem is not to be confused with the eon itself, which is a corresponding division of geologic time spanning a specific number of years, ...

https://en.wikipedia.org/wiki/Eonothem

#Eonothem #Geochronology #GeologicalEons #GeologicalUnits #Chronostratigraphy #GeologicTimeScales

These Revolutionary Maps Are Revealing Earth’s Geological Secrets
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https://www.zmescience.com/science/tectonic-model-beatiful-new/ <-- shared technical article
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https://doi.org/10.1016/j.earscirev.2022.104069 <-- shared paper
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#GIS #spatial #mapping #tomography #geology #remotesensing #structuralgeology #plates #platetectonics #earth #global #model #modeling #opendata #opensource #spatialdata #vector #platemodel #mechanics #GPS #earthquakes #volcanoes #topography #orogeny #tectonics #spatiotemporal #spatialanalysis #Pangea #Gondwana #Gondwanaland #ReuniteGondwanaland #Laurasia #lithosphere #crust #mantle #core #geophysics #geochemistry #geochronology #dating #Mesoproterozoic

Chronozone (Geology terminology ⛰️)

A chronozone or chron is a unit in chronostratigraphy, defined by events such as geomagnetic reversals, or based on the presence of specific fossils. According to the International Commission on Stratigraphy, the term "chronozone" refers to the rocks formed during a particular time period, while "chron" refers to that time period. ...

https://en.wikipedia.org/wiki/Chronozone

#Chronozone #UnitsOfTime #Paleobiology #Stratigraphy #Geochronology #Paleogeography

Deep time (Evolution 🧬)

Deep time is a term introduced and applied by John McPhee to the concept of geologic time in his book Basin and Range, parts of which originally appeared in The New Yorker magazine. The philosophical concept of geological time was developed in the 18th century by Scottish geologist James Hutton; his "system of the habitable Earth" was a deistic mechan...

https://en.wikipedia.org/wiki/Deep_time

#DeepTime #Time #Evolution #Geochronology #1981Neologisms #HistoricalGeology

from the Rocky Mountain Association of Geologists:
Titanite: the Wedge-shaped Timepiece, by Ronald L. Parker

#Titanite has a distinctive crystal form that it flaunts…

…titanite is among the very few minerals that enjoy a larger color dispersion than that of diamond…

Hayden, Watson & Wark established that the relative concentration of Zr 4+ in titanite is systematically related to pressure and temperature conditions.

https://www.rmag.org/index.php?src=directory&view=articles&srctype=detail&back=articles&refno=8425

#MinCup25 #Geochronology #Geothermobarometry

Dating Speleothems and Speleothem Growth

On Sunday I was invited to give a Science Forum webinar to the Australasian Cave and Karst Management Association. The topic was 'Dating Speleothems and Speleothem Growth'. The recording is now up on the ACKMA website. Although the talk was aimed as cave managers and guides, I hope it will be useful for anyone interested in caves and how they can be dated, as well as educators in the field of landscape evolution, Quaternary Science, stalagmite paleoclimate and caves and karst geomorphology.

http://andy-baker.org/2024/07/31/dating-speleothems-and-speleothem-growth/

#caves #karst #stalagmites #science #QuaternaryScience #earthscience #geology #geochronology

A Hidden Landscape - Interpreting Buried Archaeological Site Potential in the White River Valley, Indiana
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https://doi.org/10.5406/23274271.48.3.02 <-- shared paper
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#GIS #spatial #mapping #geoarchaeology #buriedsitepotential #inceptisols #mollisols #predictivemodel #soils #WhiteRiverValley #Indiana #model #modeling #spatialanalysis #spatiotemporal #sampling #FirstNation #indigeneous #settlements #geochronology #dating #age #construction #infrastructure #freeway #I69

Reconnaissance Basement Geology and Tectonics of North Zealandia
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https://doi.org/10.1029/2023TC007961 <-- shared paper
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#GIS #spatial #mapping #modeling #model #Zealandia #continent #NewZealand #geology #structuralgeology #Gowanda #Gowandaland #rock #dredge #sampling #samples #geochemistry #geochronology #Cretaceous #LostContinent #remotesensing #geomagnetism #geophysics #geologicmap #Mesozoic #Eocene #tectonics

4-APR-2024
Ancient ocean oxygenation timeline revealed

https://www.eurekalert.org/news-releases/1040140

#science #geochronology #astrobiology #oxygen #oceans #Earth

I've been down a UTh rabbithole the last couple of weeks - did you know most labs still use #IsoPlot to correct their UTh dates? And IsoPlot only runs on ancient versions of excel... enter Pieter Vermeesch from UCL, who has kindly written an IsoplotR package!

There are limited examples out there (understandable as the packages does EVERYTHING), so I've put one up on my github - recorrecting published dates from Treble et al. (2022).

https://github.com/MichelineCampbell/sandbox/tree/master/CalculateUThCorrections

#geochronology #rStats

New Maps Of Global Geological Provinces And Tectonic Plate
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https://doi.org/10.1016/j.earscirev.2022.104069 <-- shared paper
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#GIS #spatial #mapping #tectonicplate #tectonicprovince #orogenicsystem #orogeny #geodynamics #spatialanalysis #geology #structuralgeology #tectonics #platetectonics #global #earth #opendata #spatialdata #GPS #earthquakes #volcanoes #topography #elevation #model #modeling #crust #mantle #geoscience #lithosphere #faults #faulting #geochronology #deformationzones #GitHub

Job offer: permanent position for a luminescence dating engineer #Geochronology #LuminescenceDating #Archaeology https://www.archeosciences-bordeaux.fr/+Job-offer-permanent-position-for-an-engineer+