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Proterozoic

解释明显异常数据的两种简单情况的其中一种:山弯构造弯曲。图片来源
Posted inEditors' Highlights

地心轴向偶极子假说足矣!

by Daniel Pastor-Galán 25 September 202425 September 2024

在中国的一项详尽的研究发现在新元古代早期没有援引极端真正极移或异常地磁场的必要。

Red-tinted water flows in a shallow stretch of river, with a rocky shoreline and forested hillslope in the background.
Posted inScience Updates

How Great was the “Great Oxidation Event”?

by Aubrey Zerkle 30 July 202416 January 2025

Geochemical sleuthing amid acid mine runoff suggests that scientists should rethink an isotope signal long taken to indicate low levels of atmospheric oxygen in Earth’s deep past.

Diagram and graphs from the paper.
Posted inEditors' Highlights

GAD is Enough!

by Daniel Pastor-Galán 10 May 202425 September 2024

An exhaustive study in China finds no need to invoke extreme true polar wander nor anomalous geomagnetic fields in the early Neoproterozoic.

Satellite view of part of Badwater Basin in Death Valley, Calif., showing meandering river channels running through the arid landscape
Posted inResearch Spotlights

Mud Could Have Made Meandering Rivers Long Before Plants Arrived

by Rebecca Dzombak 31 July 202331 July 2023

New evidence from 1.2-billion-year-old rocks suggests that single, sinuous channels could have formed in muddy floodplain sediments without the stabilizing help of vegetation.

Dense green pine trees form the foreground. Gray rocks forming low-relief hills are in the middle distance, dotted with green trees, with a hazy blue sky in the background.
Posted inResearch Spotlights

Extinct Style of Plate Tectonics Explains Early Earth’s Flat Mountains

by Rebecca Dzombak 7 October 202117 February 2023

The geologic record suggests that despite Earth’s hot, thin crust during the Proterozoic, mountains were still able to form thanks to an extinct style of crustal deformation.

Lake Cadagno—an alpine lake in Switzerland with calm blue-green waters surrounded by sharp-peaked mountains
Posted inNews

Purple Bacteria Fix Nitrogen in Proterozoic-Analogue Lake

by Elise Cutts 28 September 202117 February 2023

A new study challenges the assumption that cyanobacteria were the only major nitrogen fixers in the Proterozoic eon.

Aerial view of the Grand Canyon
Posted inNews

Did Global Glaciation Cause the Great Unconformity?

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 9 April 201917 February 2023

In a new study, researchers make the case that large-scale glaciation during parts of the Neoproterozoic era led to extensive erosion of Earth’s crust.

Posted inNews

Ancient Start of Animal Evolution Wasn't Delayed by Low Oxygen

Cody Sullivan by C. Sullivan 11 January 201614 March 2023

New research finds that Earth had sufficient oxygen 1.4 billion years ago for animals to evolve. Therefore, low oxygen levels probably didn't hold back evolution, as scientists have long thought.

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Features from AGU Publications

Research Spotlights

River Alkalinization and Ocean Acidification Face Off in Coastal Waters

21 May 202521 May 2025
Editors' Highlights

Creep Cavitation May Lead to Earthquake Nucleation

22 May 202521 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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