As it became known, the oxygen type of our Earth's atmosphere originated through the work of plant organisms, by simple physical-chemical reactions.About 2.8 billion years ago the oxygen content in the atmosphere reaches 1% of today's indicators.However, an excess of gas began to observe only another 1.4 billion years ago.
This fact influenced the rise, the scale, the formation of red granite.In the Cambrian period, namely 550 million years ago, in the water began to emerge complex multicellular organisms with the presence of exoskeleton.This helped to increase the
level of oxygen in the atmosphere before 10% of the current content.
rapid hanging percentage of oxygen in the atmosphere of a planet the Earth falls on the boundary times - about 400 million years ago.This has contributed to the rapid development of a large number of plant species.As we know, the plants themselves, directly involved in the formation of oxygen.However, scientists still can not give a precise answer to the question why for 150 million years before the event, the amount of oxygen in the atmosphere could increase up to 10 times!Perhaps someday we will be able to uncover the veil of experts of this mystery.
However, modern scientists do not cease to put forward a hypothesis regarding those issues.For example, employees of the Institute of Russian Academy of Sciences (specializing in the study of the features of the earth's crust) put forward his theory.According to her, it does not exclude the existence of alternative sources affect the production of oxygen.Soaring granite stone impact on the allocation of carbon monoxide, carbon dioxide, and - water.Under this influence, the earth's crust raised the level of acidity, which resulted in the enrichment of atmospheric oxygen.