August 5, 2025: A study published in Communications Earth & Environment provides evidence for a transition in Earth’s thermal regime at approximately 3.9 billion years ago (Ga), based on geochemical analysis of zircon grains from the Jack Hills, Western Australia. This shift from exogenic (impact-driven) to endogenic (internally driven) thermal »
Substantial accumulation of free oxygen in the atmosphere occurred between ~2.45 and 2.20 billion years ago , with permanent atmospheric oxygenation commencing between 2.3 and 2.2 Ga. This period is known as the Great Oxidation Event (GOE) and marks the most dramatic change in Earth’s surface chemistry and habitability. However, »
Siem Reap has 98km of new roads and new sidewalks much of which has been paved with interesting felsic intrusive rocks from quarries in Shandong Province in China. The composition ranges from granodiorite to tonalite and is locally granophyric and pegmatitic. The intrusive consists dominantly of plagioclase, quartz, pyroxene and »
Siem Reap has 98km of new roads and new sidewalks much of which has been paved with interesting felsic intrusive rocks from quarries in Shandong Province in China. The composition ranges from granodiorite to tonalite and is locally granophyric and pegmatitic. The intrusive consists dominantly of plagioclase, quartz, pyroxene and »
The Fagradalsfjall volcano in Iceland is located on the Reykjanes Peninsular which forms the onshore portion of the Mid-Atlantic Ridge system and erupted several times in 2021. »
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