Earth

Laying geological groundwork for life on Earth

Jeholornis. Image courtesy of Han Hu et al.

Fossil bird’s skull reconstruction reveals a brain made for smelling and...

Derbyshire fossil study reveals insights into Peak District's 12 million year-old climatic past

Derbyshire fossil study reveals insights into Peak District’s 12 million year-old...

Earth, core, mantle

Researchers discover previously unknown mineralogy of the deep Earth

In 2010, two of the study's authors—David Shuster of UC Berkeley (left) and Yosemite Park geologist Greg Stock (right)—collected rock samples from the rim of Yosemite Valley, where the granite has eroded only slowly over the last 50 million years. In the distance is the upper Merced River valley. Former UC Berkeley graduate student Johnny Webb is at center. Credit: Kurt Cuffey, UC Berkeley

How old is California’s Yosemite Valley?

Using Mössbauer spectroscopy, Osaka Metropolitan University scientists investigate the iron ion status of pyroxenes, a major group of rock-forming silicate minerals. Their study revealed that in pyroxene crystals consisting of roughly 50% calcium, the tensor that determines the ratios of iron ions at the Mössbauer spectral peaks is independent of the iron content but dependent on the calcium content. Credit: Shinoda, OMU

Calcium content determines the peak intensity ratio due to iron ions...

Mount Edgecumbe rises in the foreground with Crater Ridge behind and to the north on May 19, 2022. Photo by Max Kaufman/Alaska Volcano Observatory

Research reveals magma activity beneath Mount Edgecumbe

A depiction of an asteroid heading toward Earth, with the moon in the background. (Image credit: Juan Gartner via Getty Images)

The largest meteorite impacts on Earth

Calcium oxalate crystals - In living plants, calcium oxalate crystals can take on bizarre shapes (from left: hornbeam, button mangrove, Australian nettle) Credit: © Mahdieh Malekhosseini / University of Bonn

New field of research: Crystal traces in fossil leaves

Scleromochlus taylori. Credit: Gabriel Ugueto

Triassic specimen found to be early relative of pterosaurs a century...

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