Zigong has a history of the salt industry in 2000 and a history of construction in the 1970s. In 1939 and 28, the National Government approved the establishment of Zigong City. It is one of the earliest provincial and important industrial cities in Sichuan Province, one of the earliest biological cities in China, and the first large city in southern Sichuan with a population of 1 million, and the central city in southern Sichuan is known as the hometown of dinosaurs. In the early days, Huang Jianguo, a scientific and technological officer of the geological brigade of the Ministry of Geology, and other exposed rocks near the zigong mountain paving road in Sichuan. Later, after a text search, it was confirmed that it was a fossil. Since then, Chinese archaeologists have gathered here for research.
A large number of fossils were found from scratch, so it is considered a treasure trove of fossils. In August, tons of intact dinosaur fossils were exposed to a shocked crowd. Two years later, when an oil crew blew up the rocks and built a parking lot on a nearby hill, it blew up an exciting scene, stacking and stacking dinosaur fossils again, creating a wonder of the world. A huge dinosaur colony cemetery has been rebuilt. After preliminary excavations, dinosaur fossils were found in Dashanpu, including more than 300 dinosaur individuals, more than 200, 18 full stock prices and 4 extremely rare skulls. These treasures aroused great interest from scientists at home and abroad, and they came out one after another.
Li Li's quest hopes to solve the eternal mystery of dinosaur survival. Judging from the dinosaur fossils in Dashanpu, dinosaurs are not all giants. 4d, there was a 20-foot-tall dinosaur weighing 40 tons, and another dinosaur that was only 1.4 feet long and 0.7 meters tall. Regardless of size, they don't look stupid and heavy, but they also have a wealth of experience, rapid movement, and intellectual development, with an average brain ratio of 0.56 for financial dinosaurs, about 0.8 for knocked-out dinosaurs, and an average brain ratio of more than 5 for carnivorous Tyrannosaurus rex and claw phobia. In the future, this is because they want to be simple, and eating dinosaurs cannot be separated from high intelligence. Although dinosaurs had lower body temperatures than modern mammals and foot models were worse than modern mammals, they did not hibernate.
Feathers move at speeds of more than 4 to 8 kilometers per hour. Scientists think they are warm-blooded animals, not cold-blooded animals like snakes. It is estimated that these dinosaurs were buried in the formation about 61 years ago. Under hypoxic conditions, they are formed by the flight of the ancient world and the displacement of sand and gravel. What was the cause of the collective death of dinosaurs? One view is that at the end of the Cretaceous Period, about 10,000 years ago, there was another strong crustal activity on Earth. Continuous improvement tanks in the Sichuan Basin began to appear. The Sichuan Basin, which was harvested from the sea, formed a unique natural environment, and the Zigong-Lin area was a huge pool at that time.
As a result, dinosaurs roamed here, guiding their deaths. Another key was at the end of the Cretaceous Period, when the entire earth was very cold, the temperature difference between day and night increased, and the habit of alternating seasons appeared. Dinosaurs in tropical environments could not transport animals like snakes and lizards, nor did they want fur animals to enter burrows to escape the cold. As a result, these earthly lords were escorted and punished by nature, and the above discussion casts a veil of mystery over the mystery of the death of the dinosaurs.