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geology

Black-and-white aerial photo of an atomic bomb cloud
Posted inNews

Hiroshima Bomb Created Asteroid Impact–Like Glass

Lucas Joel by L. Joel 28 May 20199 May 2022

The glass rained from the sky as the bomb annihilated the Japanese city.

X-ray tomography images of experimental magmas captured at different crystal contents
Posted inEditors' Highlights

Crystals Connect Bubbles in Explosive Magmas

by S. D. Jacobsen 28 May 20195 October 2022

Hydrous silica-rich magmas can degas through connected bubble pathways when as little as 20% crystals are present, influencing transitions from explosive, Vulcanian-style eruptions to lava effusion.

Rocks of the Saglek Block in Labrador
Posted inNews

When Water Met Rock

Lucas Joel by L. Joel 17 May 201920 June 2024

Geologists discover rocks bearing the earliest known evidence of water interacting with rock on Earth’s surface.

Photo of twelve gold grains used in this study
Posted inEditors' Highlights

X-Ray Computed Tomography Detects Resolution Scale Gold Grains

by A. Revil 2 May 201928 February 2023

A method combining partial-volume and blurring effects can be used to measure small features in computed tomography data volumes.

Close-up photo of a rock
Posted inNews

For Some Copper Deposits, Microbes Make Minable Minerals

by H. Gavin 10 April 201914 February 2023

Copper ores were long thought to form through purely chemical processes, but a recent study provides the strongest evidence yet that microbial metabolism drives mineral production.

A precariously balanced boulder on a forested cliff
Posted inNews

Precariously Balanced Rocks Reveal Earthquake History in Israel

Katherine Kornei, Science Writer by Katherine Kornei 8 April 20198 December 2022

Using the prevalence of unstable rock formations in Israel’s Negev Desert, researchers determined that historical earthquakes in the region were weaker than previously thought.

A delta channel from a large ancient delta extends into the Barents Sea
Posted inNews

Largest Delta Plain in Earth’s History Discovered in Arctic

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 1 April 201919 September 2023

If this Triassic period delta existed today, its footprint would equal about 1% of all land on Earth.

Quill volcano Sint Eustatius Island
Posted inScience Updates

Project VoiLA: Volatile Recycling in the Lesser Antilles

by S. Goes, J. Collier, J. Blundy, J. Davidson, N. Harmon, T. Henstock, J. M. Kendall, C. Macpherson, A. Rietbrock, K. Rychert, J. Prytulak, J. van Hunen, J. J. Wilkinson and M. Wilson 14 March 201927 January 2023

Deep water cycle studies have largely focused on subduction of lithosphere formed at fast spreading ridges. However, oceanic plates are more likely to become hydrated as spreading rate decreases.

Posted inEditors' Highlights

Seismic Anisotropy Due to a Compositionally Layered Mantle

by Bjarne S. G. Almqvist 8 March 20198 July 2024

Investigating the role of layered rocks and compositional banding on mineral scale in generating seismic anisotropy in the mantle.

Shale observed under strain
Posted inEditors' Highlights

Real Time Probing of Shale Cracks in Double Torsion Experiments

by A. Revil 13 February 201910 March 2023

Imaging crack propagation in shales using twin optical cameras and fast X-ray radiograph acquisition.

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Features from AGU Publications

Research Spotlights

As Wildfires Increase in the West, So Does Suppression Spending

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A Snapshot of Continental Crust in the Making

17 June 202616 June 2026
Editors' Vox

Small-Scale Indian Ocean Dynamics Underpin Marine Ecology and Climate

4 June 20263 June 2026
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