News tagged with earth mantle
Geological record shows air up there came from below
(Phys.org) -- The influence of the ground beneath us on the air around us could be greater than scientists had previously thought, according to new research that links the long-ago proliferation of oxygen ...
Space & Earth / Earth Sciences
May 23, 2012 |
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Research suggests more silicon in Earth's lower mantle than thought
For many years geophysicists have argued over the perplexing mystery regarding the amount of silicon in the Earth's mantle that is thought to have arrived there via impacts with asteroids.
Space & Earth / Earth Sciences
May 04, 2012 |
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Looking inside the Earth
(Phys.org) -- Defects found in rocks below the Earth’s surface have a major impact on the transmission of seismic waves, such as those caused by earthquakes, researchers at The Australian National University ...
Space & Earth / Earth Sciences
Apr 23, 2012 |
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Short-term episodicity of Archaean plate tectonics
Plate tectonics, the dominant process shaping Earth as we know it today, may not have existed throughout Earth's history.
Space & Earth / Earth Sciences
Mar 28, 2012 |
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A new theory on the formation of the oldest continents
German geologists from the Universities of Bonn and Cologne have demonstrated new scientific results in the April issue of the scholarly journal Geology, which provide a new theory on the earliest phase of continental format ...
Space & Earth / Earth Sciences
Mar 12, 2012 |
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Mapping the Moho with GOCE
The first global high-resolution map of the boundary between Earth's crust and mantle – the Moho – has been produced based on data from ESA's GOCE gravity satellite. Understanding the Moho will offer new clues into ...
Space & Earth / Earth Sciences
Mar 09, 2012 |
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Earth's makeup found to be more diverse than previously thought
(PhysOrg.com) -- For most of modern science, researchers have believed that the Earth was primarily made up of enstatite chondrites, a subclass of meteorites. This was because of the similarity of chromium, ...
Space & Earth / Earth Sciences
Mar 02, 2012 |
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Plate tectonics modelled realistically
Swiss scientists have for the first time succeeded in realistically simulating how an oceanic plate sinks of its own accord under an adjacent plate. At the same time they showed why only one of the plates ...
Space & Earth / Earth Sciences
Feb 23, 2012 |
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Building blocks of early Earth survived collision that created moon
Unexpected new findings by a University of Maryland team of geochemists show that some portions of the Earth's mantle (the rocky layer between Earth's metallic core and crust) formed when the planet was much smaller than it is now, an ...
Space & Earth / Earth Sciences
Feb 18, 2012 |
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Earth's mantle: New numerical tool describes rock deformation
Although solid, the rocks of the Earth's mantle deform very slowly. Professor Patrick Cordier's team at the Materials and Transformation Unit (Université Lille, France) has developed a model that makes it possible, over ...
Space & Earth / Earth Sciences
Jan 24, 2012 |
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Beam-line science to take us on a virtual journey to the center of the Earth
A new agreement between Macquarie University and the Australian Nuclear Science and Technology Organisation (ANSTO), will help us better understand everything from where earthquakes might occur to where gold ...
Space & Earth / Earth Sciences
Nov 22, 2011 |
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Exploring water in the deep Earth
(PhysOrg.com) -- Research published today in Nature Geoscience provides new insight into the water cycle of the deep Earth, volcanic activity in the Pacific and the potential catastrophic effects when these ...
Space & Earth / Earth Sciences
Nov 21, 2011 |
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Japanese scientists say giant plumes will prevent new Pangaea
(PhysOrg.com) -- For much of Earth's history, the continents have shifted around, sometimes joining with others, sometimes tearing apart to form new continents. One such shift resulted in what Earth scientists ...
Space & Earth / Earth Sciences
Sep 20, 2011 |
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Diamonds show depth extent of Earth's carbon cycle
Scientists have speculated for some time that the Earth's carbon cycle extends deep into the planet's interior, but until now there has been no direct evidence. The mantle–Earth's thickest layer –is ...
Space & Earth / Earth Sciences
Sep 15, 2011 |
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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 ...
Space & Earth / Earth Sciences
Jul 27, 2011 |
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