What is the life of the creature in 250 million years ago? "The murderer" is TA
Modern Express (Reporter Aria) billion years ago, a major global bio-extract occurred on Earth.
Who is this big extinction? It has always been constant. The mainstream view is considered that this is related to the "super volcanic" eruption at the time.
"Siberian volcanic eruption is not the only master of this big extinction.
"Recently, the research team leading to Zhang Hua, a researcher of Nanjing University, Nanjing Geological Biological Research Institute, who has caused one of the main" murderers "that caused this biological geography in many years.
On November 17, the relevant research results were published on the "scientific progress" of internationally renowned publications.
△ South China Luyou cross-sectional two stacking – three-fold recovery copper sediments and the most tragic biological generic earth in history of charging bischers, "live", "live", is the home of human beings, it is born 46 billion years ago.
In this long years, the earth has experienced five influencing events in the world.
In these five biological extensions, it is necessary to ask which one is the largest, it must be that happened to hundreds of years ago.
"At that time, more than 81% of the marine biological species and about 89% of land biological species were extinct in 60,000 years." Zhang Hua told the Modern Express reporter, and the earth is spent 5 million to recover from heavy hits. How is this large-scale extinction occurred? Scientists have proposed a lot of hypothesis, such as asteroid impact, ozone collapse and acid rain effect.
"This big gentry model and exact time are mostly from geological records in South China in my country, especially in Zhejiang Changxing Coal mountain section, this biological extinction occurs between two volcanic ash.
"Zhang Hua said that the mainstream point of view believes that the large-scale volcanic eruption is the reason why this big extinction is caused. In the early days of the bio-extinguishing start, the temperature of the earth is 25 ° C, and the biological gentry is ended, the temperature is 33 ° C. It can be seen that the earth has experienced "sudden rise" state.
The sudden rise in temperature and drought, resulting in frequent distribution of large-scale forest wildfire events worldwide, making the forests rapidly. The destruction of the forest has caused the surface surprising, and the surface soil system crashes quickly. Volcanic eruption is like a trigger, causing a chain reaction. The huge amount of carbon dioxide keeps into the atmosphere, causing oxygen deficiency and acidification in seawater, causing a lot of death.
Instead of extinction, "super volcano" has begun to spray humanity before gentry, there is an important research object to all kinds of fossils, fossils in different periods are the "record this" of earth history. This biological gentle pattern and precision time come from Hua South, why should Siberia’s "Super Volcano" sprayed this reason why this big extinction? In this regard, the research team can’t help but have questions.
"Siberian fire is rarely extinction model, the latest ancient biological information shows that there is no serious in South China in the Siberian region," Zhang Hua, said, not only this, not only the case, not only this, Siberia "super volcano "It began to erupt from 300,000 years ago, and continued to about 500,000 years after the end of the big extinction.
Among them, 1/3 of the spraying rock and the body magma invasion time are in South China’s biological extinction.
Whether it is the time and volcanic role in the large extinction, the records of South China and Siberia have inconsistent phenomenon.
why is that? What is the hidden love? …… The researchers are just like the Sherlocks prosecution, which is constantly gradually approaching the truth in the investigation and research. △ South China Second Superbar Diet During the During Copper Deposition Process Drawings It is very rich.
Suddenly, the big extinction is coming. The tropical rainforest disappears, the coal is ceased, the soil system crashes, the climate is fast and drought … my country’s Sichuan, Yunnan, Guizhou, etc. The whole process of this disaster event silently recorded. When investigating the geological rock formations in Yun Guichuan, the research team found that copper and mercury content was very high, and both elements were closely related to volcanoes.
After calculation, the acidic volcanic activity of South China has only release more than 1.9 billion tons of copper and billions of tons of sulfur dioxide.
"This short hair is 10-200 times that of the modern volcanic activity of the dioxide." The researchers speculate that the sorchiological volcanic eruption in South China has led to a large number of copper and mercury, while causing large-scale wildfire events , Destroying the land vegetation system; a large amount of sulfur-rich hydrol penetration of volcanic released on the stream, which may lead to "volcanic winter".
"The so-called volcanic winter refers to the phenomenon of abnormal atmospheric temperature after large-scale volcanic eruption." Zhang Hua further explained that it is difficult to illuminate the earth at this time, causing temperature to decrease. Subsequently, the earth began to "high fever". This rapid cooling and rapid warming may be more fatal than the long-term gradual temperature rise of the volcanic effect.
"For a long time, acidic volcanoes in other regions have been underestimated and even ignored.
Our research shows that South China’s large-scale acid volcanic eruption is also an important cause of genericity, and Siberian volcanic eruption is not the only hand of gentlestation. "Zhang Hua said that now the earth is facing a series of problems with greenhouse effects, which is very similar to the extinction in the billionary, this study or help us better understand how future organism will respond to global climate changes. .
(The Chinese Academy of Sciences Nanjing Geological Antique Biological Research Institute is designed.