Not only geologists are interested in giant canyons of Kursk Magnetic Anomaly, but also soil scientists. There is very convenient place to watch old soils, which earlier were on the surface. As the canyons grew wider, details of ancient landscapes and their changes appear. While studying one of those canyons, Svetlana Sycheva from the Institute of Geography Russian Academy of Sciences has found that earlier there was a system of large ravines, now buried under a thick layer of sediments.
It was found that the landscape and soil changes do not occur randomly, in fact, they are strictly periodic - the glacier epochs take turns with interglacial ones. The old gully, which Sycheva was studying, formed about 130 thousand years ago, at the end of the Dneprov icing, when there was a sudden, even catastrophic climate change. Dry and cold weather, which caused permafrost in Central Russia, was changed by wet and warm Mikulin interglacial period. When sudden soil defrost came and too much water flowed in because of glacier thawing, soils began to cover all the ravines, even large ones.
As the climate settled and warming came, the newly formed earth relief acquired vegetation and soils developed. The gully was `resting`, being covered with forests. That lasted for 15 thousand years. At the end of Mikulin interglacial period, a series of cataclysms happened, because of frequent changes of warmth and frost. After a long drought, severe fire broke out and destroyed forests in gullies. Without vegetation, the slopes destructed and fertile soils were washed out. By the middle of Valday icing (50-40 thousand years ago), the gully was covered with sediments from water flows.
Tatiana Pitchugina | alphagalileo
Supercomputing helps researchers understand Earth's interior
23.05.2017 | University of Illinois College of Liberal Arts & Sciences
How is climate change affecting fauna in the Arctic?
22.05.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...
23.05.2017 | Event News
22.05.2017 | Event News
17.05.2017 | Event News
23.05.2017 | Physics and Astronomy
23.05.2017 | Life Sciences
23.05.2017 | Medical Engineering