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geochronology

Researchers collect sediments from a rocky stream with a helicopter and steep rock hills in the background
Posted inScience Updates

Earth’s Continents Share an Ancient Crustal Ancestor

by J. Hollis, C. Kirkland, M. Hartnady, M. Barham and A. Steenfelt 23 August 202122 February 2022

How did today’s continents come to be? Geological sleuths found clues in grains of sand.

Photograph of The Great Unconformity visible in The Grand Canyon
Posted inEditors' Highlights

The Great Unconformities?

by Peter van der Beek 3 August 20219 December 2022

New thermochronology data and thermal history modeling from the Canadian Shield show that the Great Unconformity formed there later than elsewhere in North America and may represent another event.

During the Mesozoic, the fragmentation of Pangaea contributed to long-term climate trends.
Posted inResearch Spotlights

Simulating 195 Million Years of Global Climate in the Mesozoic

by Jack Lee 30 July 20217 October 2021

An ensemble of climate simulations identifies factors that drove long-term trends of a prehistoric greenhouse climate.

Irtysh River flowing through Siberia.
Posted inResearch Spotlights

Irtysh River Drove Arctic Sea Ice Expansion 3 Million Years Ago

by David Shultz 29 July 202126 January 2023

The Siberian river’s creation caused a massive influx of fresh water into the Kara Sea and radically changed the Arctic Ocean and Earth’s climate.

Sunrise over an unpaved road near Apulo, Colombia
Posted inNews

The Rocky Roads of Colombian Paleontology

by Camilo Garzón and Santiago Flórez 7 May 20218 November 2021

Colombia has a wealth of fossils, and geologists are leading the charge to both collect data and share ancient history with local communities.

Yangtze River
Posted inResearch Spotlights

Researchers Home in on the Age of the Yangtze River

by Joshua Rapp Learn 10 March 202126 January 2023

Findings on the river’s age also have implications for past landscape change in Asia.

A rocky hillside in Antarctica with snow-covered Mount Erebus in the background
Posted inResearch Spotlights

Antarctic Lava Yields Clues to Earth’s Past Magnetic Field

by Sarah Stanley 3 February 20214 October 2021

A new analysis suggests that a widely accepted approximation of ancient magnetic field strength may be less accurate for the past 5 million years than previously thought.

A researcher looks closely at a rocky cliff near the shoreline on Saint Helena.
Posted inNews

A Robust Proxy for Geomagnetic Reversal Rates in Deep Time

by Alka Tripathy-Lang 14 December 202027 January 2023

The strength of Earth’s magnetic field in the distant past can tell scientists whether the planet’s magnetic poles were steady or prone to frequent reversals.

A 3D computer illustration of Hesperosuchus, an extinct genus of crocodylomorph reptiles
Posted inNews

A Little-Known Mass Extinction and the “Dawn of the Modern World”

by S. Norris 9 November 202027 October 2022

Volcanic eruptions in what is now western Canada may have triggered a million years of rain and a mass extinction that launched the reign of the dinosaurs.

Illustrations of Bigfoot, a manatee, a giant sloth, and a mermaid
Posted inNews

Podcast: Mythical Monsters and Their Real-Life Inspirations

by S. M. Hanlon 28 October 202029 September 2021

This Halloween season, explore the connections between mythical monsters like Bigfoot and the Kraken and the creatures on which they’re based.

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“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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