News tagged with upper mantle

When continents formed

A new way to calculate the age of the Earth's crust has been developed by researchers from the University of Bristol and the University of St Andrews.

dateJan 13, 2011 in Earth Sciences
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As the World Churns

( -- "Terra firma." It's Latin for "solid Earth." Most of the time, at least from our perspective here on the ground, Earth seems to be just that: solid. Yet the Earth beneath our feet is actually in constant ...

dateDec 28, 2009 in Earth Sciences
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Is old rock really as 'solid as a rock'?

In the course of billions of years continents break up, drift apart, and are pushed back together again. The cores of continents are, however, geologically extremely stable and have survived up to 3.8 billions of years. These ...

dateSep 08, 2015 in Earth Sciences
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Earth's mantle plasticity explained

Earth's mantle is a solid layer that undergoes slow, continuous convective motion. But how do these rocks deform, thus making such motion possible, given that minerals such as olivine (the main constituent of the upper mantle) ...

dateMar 07, 2014 in Earth Sciences
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The Atlantic 'resting' -- for now

Geophysicists have simulated when the continents around the Atlantic develop active continental margins with earthquakes and volcanoes. According to the model, ‘real’ fully active subduction zones will not form ...

dateMay 23, 2011 in Earth Sciences
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