Sichuan Zigong, the hometown of dinosaurs, the thousand-year-old salt capital, the southern lamp city, you come or not

Zigong can become the home of dinosaurs, Zigong has a history of two thousand years of salt industry and 70 years of founding history. In 1939, in the 28th year of the Republic of China, the National Government approved the establishment of Zigong City as one of the earliest provincial municipalities and industrial centers in Sichuan Province, and one of the earliest 23 organized cities in China. The first large city in the Chuannan region of Zigong City with a population of one million is known as the land of dinosaurs. In the early 1970s, Huang Jianguo, a scientific and technological officer of the Second Geological Brigade of the Ministry of Geology, and others accidentally found a biological fossil in the exposed rock layer next to the road on the slope of Zigong Mountain in Sichuan. Later, after research, it was confirmed that this was a dinosaur fossil. Since then, Chinese archaeologists have gathered in this hilly and remote area and found a large number of continuous fossil veins from it, so they believe that this place is a treasure trove of fossils. In October 1977, a complete dinosaur fossil weighing 40 tons was displayed in front of stunned people. Two years later, an oil crew blew up a thrilling sight as it blew up rocks on a nearby hillside to build a parking lot. Dinosaur fossils overlapped and piled up, a world wonder, and a huge dinosaur group burial ground reappeared. After preliminary excavations, more than 300 boxes of dinosaur fossils and more than 200 individual dinosaurs were excavated from Dashanpu. Relatively complete stock price. Eighteen sentences of extremely rare skull assassins. These genuine products have aroused great interest from scientists at home and abroad, and they have come to carry out them. You're there. Field research, hoping to solve the mystery of the survival of dinosaurs, from the mountain shop dinosaur fossils, dinosaurs are not all behemoths. At that time, there was water that was 20 meters long and weighed 40 tons, and the ancient dragon also had a bird's foot dragon that was only 1.4 meters long and 0.7 meters high. They did not appear bulky, no matter how big or small, and they were energetic and agile, and the intelligence of dinosaurs was relatively developed. The average brain IQ of stegosaurus is 0.56, the horned and horned dragons are around 0.8, and the carnivorous Tyrannosaurus rex and dinosaurs exceed five. I think it's because they want to be simple. Vegetarian dinosaurs, without higher intelligence is not OK. Although dinosaurs had lower body temperatures and worse striped physiques than modern mammals, they did not hibernate, had no feathers, and moved at more than 4.8 kilometers per hour. So scientists think they're hot-blooded animals, not cold-blooded animals like snake suckers. It is estimated that these dinosaurs were buried in the strata 1.6 billion years ago. Under hypoxic conditions, it is formed by the consolidation, cupola and replacement of sediment rocks. The fossils seen now, so what caused the dinosaurs to die collectively here? One view is that at the end of the Cretaceous Period about 70 million years ago, the Earth underwent another strong crustal activity, the Sichuan Basin continued to rise, and water dryness began to appear in the early autumn. Lin Jie's Sichuan Basin, which rises from the sea, forms a unique natural environment, and the Zigong area was a large pool at that time, so the dinosaurs floated here until they died. Another key is that at the end of the Cretaceous Period, the entire earth experienced widespread cold, the temperature difference between day and night increased, and the dinosaurs that used to the tropical environment at the turn of the seasons could not freeze like snakes and lizards, and could not hide in caves like fur animals. As a result, these earth overlords were punished by the cold of nature. The above arguments are endless, and the mystery of dinosaur death is overshadowed.