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geochronology

An impact on the surface of Mars creates a shower of debris.
Posted inNews

Martian Meteorites Reveal Evidence of a Large Impact

by Katherine Kornei 15 March 202215 March 2022

By analyzing rare Martian meteorites, researchers have uncovered a crystalline structure created by a large asteroid or comet impact that potentially affected the Red Planet’s habitability.

Room-size instruments make up an argon dating lab at Arizona State University.
Posted inFeatures

Long-Term Planning For Deep-time Labs

by Richard J. Sima 22 February 202210 May 2022

When directors depart argon labs, what happens to their expensive equipment, skilled staff, and institutional knowledge?

Brown, barren, relatively flat land stretches into the distance, dotted with occasional patches of white snow. The dark blue Arctic Ocean laps the shore. A thin sliver of sky is gray and cloudy.
Posted inFeatures

Updating Dating Helps Tackle Deep-Time Quandaries

by Alka Tripathy-Lang 22 February 20229 December 2022

Geochronologists are finding fresh approaches to familiar methodologies, especially by zapping rocks with lasers to tackle classic Precambrian problems.

An illustration showing volcanic activity and meteorite impacts on Earth during the Hadean, 4 billion years ago.
Posted inAGU News

How to Work in the Dark on Deep Time

by Heather Goss 22 February 20223 January 2023

Researchers who study the formation of Earth show how ingenuity can shed light on hidden moments of creation.

An inlet of Lake Toba in Indonesia, surrounded by tropical vegetation
Posted inNews

La vida después de una super erupción

by Danielle Beurteaux 9 November 202116 March 2022

Una vez que una erupción volcánica masiva termina, el sistema subyacente puede mantenerse activo por miles de años. Una nueva investigación vislumbra cómo funcionan los ciclos de super erupciones.

An inlet of Lake Toba in Indonesia, surrounded by tropical vegetation
Posted inNews

Life After a Supereruption

by Danielle Beurteaux 27 October 202116 March 2022

Once a massive volcanic eruption is finished, the underlying system can remain active for thousands of years. New research illuminates how supereruption cycles work.

Un buzo se acerca a roca cubierta con tapetes multicolores de bacterias.
Posted inNews

Días más largos probablemente incrementaron el oxígeno temprano de la Tierra

by Damond Benningfield 1 October 20218 April 2022

Tapetes microbianos en el sumidero del Lago Huron, combinado con modelado, sugiere que el cambio en duración del día de la Tierra podría haber jugado un rol principal en la oxigenación de la atmósfera.

A diver approaches rocks covered with multicolored mats of bacteria.
Posted inNews

Longer Days Likely Boosted Earth’s Early Oxygen

by Damond Benningfield 3 September 202117 November 2021

Microbial mats in a Lake Huron sinkhole, combined with modeling work, suggest that the changing length of Earth’s day could have played a key role in oxygenating the atmosphere.

Jane, an anthropomorphized zircon crystal, complete with a face, arms, and legs, experiences stages of development in a magma chamber.
Posted inGeoFIZZ

Meet Jane, the Zircon Grain—Geochronology’s New Mascot

by Alka Tripathy-Lang 27 August 202121 March 2022

In a children’s book written by geochronologist Matthew Fox, he condenses 400 million years of history into 34 playfully poetic pages as he follows the travels of a single grain of sand.

流经西伯利亚的额尔齐斯河
Posted inResearch Spotlights

300万年前,额尔齐斯河推动了北极海冰的扩张

by David Shultz 25 August 202129 September 2021

西伯利亚河的形成导致大量淡水流入喀拉海,从根本上改变了北冰洋和地球的气候。

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Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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