Date: 3 months ago   Category: Science

The reason of the most terrible accident on Earth is explained


Scientists of the Center of petrographic and geochemical researches in France have found out how the volcanic activity in Siberia became about 252 million years ago so strong that has led to mass Perm extinction. It has turned out that live organisms have in large quantities died out because of release of the greenhouse gases which are stored in Earth lithosphere. The Science Alert edition reports about it. Mass Perm extinction or Great extinction is the most large-scale environmental disaster in the history of Earth. It is considered that she has happened because of outpouring of huge volumes of magma according to all East Siberian platform. 96 percent of sea types, 73 percent of species of land vertebrata and also 83 percent of species of insects have as a result disappeared. By estimates of scientists, impoverishment of biological diversity lasted 60 thousand years. The volcanic activity which was followed by emissions of ashes and gases has led to exhaustion of an ozone layer and warming up of the atmosphere of Earth. However, by calculations of scientists, there were not enough volumes of the volatiles produced when outpouring magma for sharp climate change. Researchers have studied the Siberian peridotites — breeds which contain in the top part of an Earth's mantle and jump out on a surface with eruptions of volcanoes. Peridotites meet in the form of xenoliths — the fragments of rock taken by magma. The age of the analyzed samples reached 160-360 million years. It has turned out that the most ancient breeds contained a large amount of halogens, including chlorine, bromine and iodine. These elements meet in sea water and get to a cloak at immersion of the oceanic crust under continental in subduktion zones. At the same time in younger breeds the amount of halogens sharply falls. It indicated that huge volumes of volatile compounds (about 70 percent) have been exempted from their total at an important catastrophic event which has taken place about 250 million years ago. Thus, the containing halogens of substance have been released into the atmosphere and have affected global climatic system. It is more than important news in Film of Day Telegram-channel. Subscribe!

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