恐龙为什么会灭绝（用英语回答）86
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发布时间：2023-09-29 03:27
共4个回答
热心网友
时间：2024-11-24 04:29
1. Earth's crust has been outside of the asteroid impact. So that the crust comes from the breakdown of the inner core of a huge eruption of hot magma out. Weak on the crust of an enormous force, so that the crust there have been a strong change . Is the performance of its huge earthquakes and volcanic eruptions. I think because of the growth of the dinosaur era, inclusive of the surface of the Earth's crust is thin and fragile. Frequent strong earthquakes and volcanic eruptions.
2. I was under the power of material to five-dimensional space. Is the movement of material generated by the role of scientific discovery. Through the exploration and study found that: the geological age of dinosaur life. Earth to just one out of the incubator, like soft-shell egg. Therefore At that time, the crust is very weak. There is a collision of a planet outside the breakdown occurs. For these reasons so that the core of the Earth's interior heat from the magma eruption. Resulted in the Earth's surface large-scale volcanic eruptions and earthquakes. Therefore , Resulting in the extinction of the dinosaurs.
3. For these reasons make the Earth a huge animal has been swallowed up --- dinosaurs and the extinction was eventually buried. And the fear of animals and plants was part of the hot volcanic magma buried by became the dinosaurs and fossils of animals and plants. Another part of the crust was generated by the earthquake surface cracks and wrinkles become covered in the ground to melt into the crystallization of the oil and coal. Since then, fans of the extinction of dinosaurs was I opened a. Extinction of dinosaurs on Earth, the Earth's newborn Animals and plants and start the growth and reproction. Earth and the beginning of a new orogeny. Earth has undergone enormous changes changed in general. The following article, I confirmed that the scientific findings:
Mesozoic history of the Earth has been a wide variety of live reptiles - dinosaurs. This is the key to the Earth 1.6 billion years ago a large group of animals at the end of the Cretaceous has been a sudden fall. Up to now, about all kinds of reasons for the extinction of dinosaurs could not justify the explanation, which the United States proposed by the physicist Luyiaer Varese and asteroids colliding with Earth hypothesis of much recent attention. In his study of Italian Gubbio area at the end of the Cretaceous formation of clay found trace elements - the iridium content than other rocks in a sharp increase ring the 30 to 160 times, followed by people from various locations in the world have come to the same test sample Concluded that the end of the Cretaceous formation elemental content of iridium anomaly is higher universal. Alvarez then that in the late Cretaceous have a diameter of about 10 km of the asteroid impact on Earth, the st generated by Zhetianbiri, causing the surface environment, climate change has led to the demise of the dinosaurs. However, the use of asteroids colliding with rocks to explain the increase in the content of iridium in the extinction of dinosaurs and there are a lot of doubt.
1, asteroids are generally from silicon and iron elements constitute a category, such a huge asteroid falls on the earth's surface even if a long time and can not trace any, and on earth has never been found to have such a large-scale meteorite;
2, the end of the Cretaceous strata of most of the cooling lava rock formed by the accumulation of st from the surface only a small fraction of sedimentary rock. Only an asteroid impact st up to the vast majority of animals and plants on Earth was buried as deep as several kilometers of rock in it?
3, an asteroid will be able to contain the element iridium evenly spread as well as covering the entire surface of the earth you Moreover, the element iridium on the existence of extraterrestrial asteroid (not a lot of content), in the depths of the Earth also exist, why Only that of the Earth from outside the Earth's interior rather than from it?
In fact, the end of the Cretaceous formation of the abnormal increase in iridium content with the dinosaur extinction is indeed closely related, but through careful study has a different conclusion can be drawn. We know that in the Earth's interior to carry out the thermonuclear reaction will continue to play a huge accumulation of energy, once the earth's crust could not bear, the internal pressure to break through the crust will form a major outbreak of the release of all of a sudden. Iridium - mainly in the core element in the outbreak through the lava eruption from the depths of the Earth's crust to the surface, and recognized the signs of the end of the Cretaceous clay layer is the accumulation of a large number of volcanic st to form (the scientists in Hawaii Kelaweiya volcanic gases emitted from the test had a small amount of iridium). Therefore, the end of the Cretaceous formation of iridium content is more precisely to demonstrate the universality of the earth's crust there have been violent eruption.
File fossil tells us that the vast majority of the death of dinosaurs and the vast majority of dinosaur egg fossils in the output ring the late Cretaceous period have been found in dinosaur and dinosaur egg fossils in the preservation of all the iridium-rich thin layer of clay strata , In the late Cretaceous period after the formation of the disappeared, the geological and academic circles that the end of the Cretaceous orogeny large-scale and a series of fierce global tectonic changes coincide with the time being.
Originally widespread flora and fauna flourish in the face of the earth's crust after the outbreak of the expansion of the split to form the continental shelf and the mainland now, when most of the animals and plants on Earth by the eruption buried by volcanic ash and lava. Dinosaurs and other animal remains at high temperature, high pressure, isolated from the air thick rock, a long time, now turned into oil. So far as exploration in all continents (including Antarctica) and the formation of the Continental Shelf oil reserves are in the distribution of (the ocean basins are formed after the outbreak of so large an exception), the only difference between the relative concentration or just scattered.
In recent years, Inner Mongolia in the Bayan called Kathman at the end of the Cretaceous formation, unearthed hundreds of original angle and a dragon fossil, a large number of complete dinosaur skeletons piled up together in groups, from the buried remains of the position, they are in the extreme Died in pain, of which there are a whole nest of baby dinosaur skeleton. This scenario shows that they are disastrous collective death, death and the body was buried quickly in place (in other parts of the world, many dinosaur fossils have characteristics similar to the death). At the same time found the fossil-bearing rock is a red brick powder sand rock, which by the large accumulation of volcanic ash from the fossil sedimentary rock formation is the best environment. The dramatic changes in the environment that can process all of a sudden and very short-term (new star suddenly broke out when the time-often only a few days to several months). If the Earth's environment is a graal change in a long time, the population is the slow demise of the dinosaurs, they definitely would be heavy to very far-reaching, and will not stay buried a lot of time so the relative concentration of fossils of dinosaur eggs and dinosaur nest as a whole Fossil baby. Therefore, most of the dinosaur should be in the normal living environment has been the case all of a sudden come as a result of the devastating disaster and a large number of deaths.
A large number of oil and coal, as well as possession of the earth's environment at that time reflected the characteristics of animal and plant fossils have shown that before the end of the Cretaceous, the Earth's atmosphere density and thickness than now, relatively flat surface, the world is very warm and humid climate. At that time the equator and the polar temperature difference is very small, in the 1980s, geologists in Canada's Ellesmere Island in the Arctic Circle found a shirt with water-based fossil forest, the forest there are fossils of animals such as alligators, Polar has been that with the tropical climate and environment. The natural environment is the decision of the main forms of life, after the outbreak of the Great Earth, when the bodies of those huge dinosaurs living in hot and humid environment no longer exists, even if some of the survivors could not adapt to the changes in the relative cold and dry, well-being The distinction between seasonal climate and the environment to survive. Therefore, most of the dinosaur extinction would be a natural.
There are a part of the dinosaurs survived (most of the smaller body) and some as early as the Jurassic has been the evolution of ancient birds, mammals animals (such as by the evolution of the pterosaur archeopteryx), follow the natural selection, fitness The survival of the natural law, a relatively poor environment, evolving through 7000 years, most of the species has changed the original shape by the temperature of cold-blooded for the evolution of the cold temperature can adjust the blood of animals (birds, mammals And human). Of course, every time a large-scale evolution of species, there will always be some of the species to retain the status quo. As the evolution of fish to amphibians, fish still continue to survive, the reptiles are in a very small number (alligators, lizards, etc.) has maintained a 7,000 million years ago dinosaurs of the original shape.
Rocks in the Earth's biological heritage revealed in the history of the evolution of life, can occur at a certain time period mass extinction of species, at the end of the Cretaceous dinosaur extinction is not the only disaster in the earlier era there have been many times. In the case of 5.4 billion years ago, most of the invertebrate in a very short period of time appear all of a sudden the "Cambrian explosion", shows that from a single biological cells to the evolution of multicellular animals, reptiles and mammals to the evolution of the same It was indeed an abrupt process (in 1984 have found China's Yunnan Chengjiang fossils as evidence).
So far no clear evidence that large-scale extinction of the dinosaur extinction was caused by an asteroid impact. However, the geological structure of the earth's interior frequent changes in the (still continuing) the facts show that the cyclical changes in the tectonic (explosion) environmental "disaster" in the evolution of life has always been playing a leading role. Of course, small-scale evolution of the species is graally throughout the evolution of life. Periodic outbreak of the celestial bodies is all the planets (including Earth) in the course of the evolution of an important and indispensable link (such as the outbreak of the Rising Star). Those in the mountains of fossils of marine and submarine oil deposits is explained as a result of the dinosaur era of dramatic change in the earth's crust and the best end of that.
好了，原因和疑点都有了。
热心网友
时间：2024-11-24 04:29
热心网友
时间：2024-11-24 04:30
热心网友
时间：2024-11-24 04:30
