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micas

In the center of a cross-polarized image, a purple-pink grain of muscovite with dark asymmetric kink bands lies within a matrix of much finer grained, rainbow-colored micas, as well as small black, white, and gray feldspar and quartz grains.
Posted inNews

Tiny Kinks Record Ancient Quakes

by Alka Tripathy-Lang 19 July 202114 September 2022

As Earth ruptures, micas kink. These kink bands hide in rocks millions of years old, preserving evidence of past quakes.

Greenery forefronts an image of a dust storm clouding the horizon
Posted inNews

Dusting Off the Arid Antiquity of the Sahara

Sarah Derouin, Science Writer by Sarah Derouin 14 October 20192 March 2023

New research on the geochemistry of Canary Islands paleosols shows that the Sahara has been an arid dust producer for at least 4.8 million years.

Muscovite in polarized light
Posted inNews

Ancient Precipitation Reveals Clues About Mountains and Climate

Katherine Kornei, Science Writer by Katherine Kornei 17 September 20192 March 2023

By studying the chemical signatures of 300-million-year-old precipitation, researchers find evidence that the supercontinent Pangea contained peaks as tall as the European Alps.

Features from AGU Journals

RESEARCH SPOTLIGHTS
Geophysical Research Letters
“Neural Networks Map the Ebb and Flow of Tiny Ponds”
By Sarah Derouin

EDITORS' HIGHLIGHTS
Community Science
“Collaboration Helps Overcome Challenges in Air Quality Monitoring”
By Muki Haklay

EDITORS' VOX
Reviews of Geophysics
“What We Know and Don’t Know About Climate Tipping Elements”
By Seaver Wang

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