The swirl of malleable rock in the earths mantle – located between the earths crust and core – may have greater effect on the earths surface than was once believed, a Purdue research team reports.
Under the boundary between two crustal plates, zones in the mantle with different temperatures swirl together like storm fronts in the atmosphere. Over the millennia, these subterranean warm and cold fronts produce storms in the mantle that can move mountains up on the crust. (Image provided by Scott D. King)
Seen from below, a cold region (colored blue) is sandwiched between two warmer regions (yellow). Over millions of years, these subterranean "storms" can affect the motion of the crust and alter geographical features on the surface, as evidenced by the dramatic angle in the Hawaii-Emperor seamount chain. (Image provided by Scott D. King)
Using computer technology to create three-dimensional models of the earths mantle, Purdues Scott King has found evidence that some dramatic features of the earths surface could be the result of relatively rapid shifts in the direction in which crustal plates move. Rather than simply drifting along in straight lines over millions of years, plates can be pushed aside or even be made to reverse direction due to convection in the mantle far beneath them.
"This is not an idea that has been seriously considered before," said King, professor of earth and atmospheric sciences. "Up until this point, plates were thought to change direction more or less independently from the slow-moving mantle. But with the aid of better computer technology, now we are beginning to realize that they are interconnected. The third dimension is important – we have to consider the earths depths if we are ever to understand its surface."
Chad Boutin | Purdue News
Greenland ice flow likely to speed up: New data assert glaciers move over sediment, which gets more slippery as it gets wetter
17.08.2017 | Swansea University
Climate change: In their old age, trees still accumulate large quantities of carbon
17.08.2017 | Universität Hamburg
Whether you call it effervescent, fizzy, or sparkling, carbonated water is making a comeback as a beverage. Aside from quenching thirst, researchers at the University of Illinois at Urbana-Champaign have discovered a new use for these "bubbly" concoctions that will have major impact on the manufacturer of the world's thinnest, flattest, and one most useful materials -- graphene.
As graphene's popularity grows as an advanced "wonder" material, the speed and quality at which it can be manufactured will be paramount. With that in mind,...
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
17.08.2017 | Physics and Astronomy
17.08.2017 | Earth Sciences
17.08.2017 | Physics and Astronomy