Articles on Geology

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Tick tock, tick tock… You can’t hide from the molecular clock. www.shutterstock.com

Explainer: what is the molecular clock?

The molecular clock is helping us deepen our knowledge of evolution and completing the tree of life. But how does it actually work?
The April 2015 earthquake flattened villages and towns, but more may be to come. AAP Image/Jonathan Hyams/Save The Children

Nepal earthquake may have ‘unzipped’ fault line, boosting risk of future quake

New research shows the earthquake that struck central Nepal in April this year was only a partial rupture of the fault line, meaning another strong quake could be due in future.
Piton de la Fournaise or “Peak of the Furnace” on Reunion Island is one of the world’s most active volcanoes, shown erupting in August 2015. AAP/NewZulu/Vincent Dunogué

Explainer: why volcanoes erupt

What happens beneath the surface before a volcano erupts? Can we predict when one will blow? And how can typhoons and melting glaciers contribute to big eruptions?
This lot survived rapid global warming – so why can’t we? Jay Matternes / Smithsonian Museum

Sudden global warming 55m years ago was much like today

It is often said that humans have caused the Earth to warm at an unprecedented rate. However researchers have discovered another period, some 55m years ago, when massive volcanic eruptions pumped so much…
How many continents can you count on one hand? Chones

Continents may not have been created in the way we thought

From the 1950s until recently, we thought we had a clear idea of how continents form. Most people will have heard of plate tectonics: moving pieces on the surface of the planet that collide, pull away…
Nailing down the sites of ancient volcanic eruptions could help identify mineral deposits. Ásgeir Kröyer/Flickr

Tracing the Earth’s hottest volcanoes from core to ore

Volcanic eruptions are as old as the planet itself. They inspire awe, curiosity and fear and demonstrate the dynamic internal activity of the Earth. However, the impact of modern volcanoes pales in comparison…
Much of Tasmania’s World Heritage has been sculpted by ice. The extension to the area (currently under debate) adds to all these values. Simon Lieschke/Flickr

Tasmania’s World Heritage debate needs to look beyond the trees

The debate around Tasmania’s controversial World Heritage extension, under review this week at international talks in Doha, has centred on forests. But the area includes far more than “just” trees — including…
The Grand Canyon of Mars – Valles Marineris. NASA,Viking Project,USGS

Lava, not water, formed canyons on Mars

The canyon-like scars which line Mars’ crust are seen by many as evidence for liquid water. But a study now suggests that a different kind of fluid – one much less hospitable to life – may actually have…

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