News tagged with mantle

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Deep recycling in the Earth faster than thought

The recycling of the Earth's crust in volcanoes happens much faster than scientists have previously assumed. Rock of the oceanic crust, which sinks deep into the earth due to the movement of tectonic plates, ...

Aug 10, 2011
4.5 / 5 (4) 18 | with audio podcast

Reservoirs of ancient lava shaped Earth

Geological history has periodically featured giant lava eruptions that coat large swaths of land or ocean floor with basaltic lava, which hardens into rock formations called flood basalt. New research from Matthew Jackson ...

Jul 27, 2011
4.7 / 5 (6) 0 | with audio podcast

What keeps the Earth cooking?

What spreads the sea floors and moves the continents? What melts iron in the outer core and enables the Earth's magnetic field? Heat. Geologists have used temperature measurements from more than 20,000 boreholes ...

Jul 17, 2011
4.6 / 5 (24) 50 | with audio podcast

New explanation for Hawaiian hot spot

(PhysOrg.com) -- Scientists in the US have suggested that volcanic activity in Hawaii could be fed by a giant hot rock pool 1,000 kilometers west of the islands and in the Earth’s mantle, rather than ...

May 27, 2011 report
4.4 / 5 (13) 3 | with audio podcast

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 ...

May 23, 2011
4 / 5 (2) 2

Earth's inner core is melting... and freezing

The inner core of the Earth is simultaneously melting and freezing due to circulation of heat in the overlying rocky mantle, according to new research from the University of Leeds, UC San Diego and the Indian ...

May 18, 2011
4.6 / 5 (14) 10 | with audio podcast

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.

Jan 13, 2011
3.2 / 5 (5) 2 | with audio podcast