News tagged with upper mantle

As the World Churns

(PhysOrg.com) -- "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 ...

Dec 28, 2009
4.4 / 5 (19) 29

Is there an ocean beneath our feet?

(Phys.org) —Scientists at the University of Liverpool have shown that deep sea fault zones could transport much larger amounts of water from the Earth's oceans to the upper mantle than previously thought.

Jan 27, 2014
4.6 / 5 (15) 4 | with audio podcast

Looking for a new gold mine? We've got the map

As published this month in Nature Geoscience, researchers and industry partners have produced the first major 'cat scan of the earth'. Their work reveals a new chart of the sub-continental lithosphere mantle ...

Oct 28, 2013
4.3 / 5 (10) 1 | with audio podcast

'Highway from hell' fueled Costa Rican volcano

If some volcanoes operate on geologic timescales, Costa Rica's Irazú had something of a short fuse. In a new study in the journal Nature, scientists suggest that the 1960s eruption of Costa Rica's larges ...

Jul 31, 2013
4.7 / 5 (9) 0 | with audio podcast

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 ...

Mar 07, 2014
5 / 5 (6) 0