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geochronology

Images showing the ArchKalmag14k model output for Paris (France) compared to other geomagnetic field models..
Posted inEditors' Highlights

Time-Step Filtering in Holocene Global Magnetic Field Models

by Mark J. Dekkers 9 June 202229 June 2022

Through a local fixed time-step filter, global Holocene magnetic field models remain mathematically tractable refining our insight into field variability and improving archeological dating.

Rocky high mountain landscape under a clear blue sky, with vegetation and a small lake in the foreground.
Posted inScience Updates

A Puzzle Mat for Assembling Colombia’s Geologic History

by Carolina Ortiz-Guerrero 11 April 202211 April 2022

A new database compiles all the available pieces of information about Colombia’s geochronology, offering scientists a consistent framework in which to view and study the data in a broader context.

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 202222 February 2022

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

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.

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