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Chapter 460 has a professional and boring introduction, you don’t need to read it

"The Tertiary, which is the old name of the Paleogene and Neogene, but this geological age name is no longer recognized by the official mission, and has been split into two periods, the Paleogene and the Neogene.

The next story I want to tell happened during this period. In 1945, geologist Mr. Huang Jiqing proposed to use the Himalayan movement to represent the Cenozoic orogeny in our country, which is now generally referred to as the Himalayan orogeny. This concept It is generally accepted by geoscientists, but there are differences in the understanding of tectonic movement stages and geodynamic background.

Let’s not talk about these, after all, we are not professional in this matter, just listen to it. The main focus is on the event I mentioned, which is the Himalayan orogeny. This movement is mainly divided into three acts.

The first scene occurred from the end of the Eocene to the beginning of the Oligocene, when the seawater completely retreated from the Qinghai-Tibet Plateau, accompanied by strong folds, faults and intrusion of neutral magmatic rocks;
The second act occurred in the early Miocene, with strong folds, faults, magmatic activity, and metamorphism, forming large-scale thrust faults and nappe structures, leading to large-scale uplift of the crust and magma intrusion;

The third episode, from the Pleistocene to the present, is mainly manifested in the sharp uplift of the plateau, the substantial subsidence of the surrounding basins, and the continued activity of the old faults, and Quaternary volcanic eruptions in some areas.

Of course, the three I just mentioned have some technical terms, and here everyone can understand it as changes in terrain. In fact, it was during this period that the Indian plate finally collided with the Eurasian plate very closely after a long journey. The entire eastern part of the Eurasian plate was once again squeezed close to the north-south direction.

Under this intense compression, the Himalayas and the Qinghai-Tibet Plateau rose rapidly, followed by various topographical changes. The well-known Himalayas, Yarlung Zangbo River, Tianshan Mountains, Tanggula Mountains, Hoh Xil Mountains, etc. appeared in this way. , This change even once extended to the direction of Daxinganling. "

Zhang Yang's sudden popularization of science, and even throwing out a lot of technical terms, made people sound a little dizzy. Even if the people in the live broadcast room had the skill of a hundred birds and a phoenix, they still didn't hear it well. Taste, feel a bit boring and do not understand.

"Emmm, the scumbag said he didn't understand!"

"23333 Xueba said that he didn't understand too much!"

"666 didn't expect Brother Yang to know about the Himalayan orogeny, haha, people who don't study geography really don't understand this!"

"I heard that some people here are talking about geography and history. I came here to learn history on QH, and I said I was very happy!"

"BD came to report, and the story is good. Pay attention decisively, and a small gift is not a respect."

"I heard from the students that there is actually an anchor talking about the Himalayan orogeny. I'll listen to it too, old man!"

"Wow, it's Professor Kang. It's actually Professor Kang from our QH side. Haha, Brother Yang, you are so stupid that you actually attracted the professor!"

"Emmmm, isn't this an entertainment anchor? The scumbag is trembling!"

Even Zhang Yang himself was taken aback, not to mention the fans in the live broadcast room, he didn't know what was going on, his commentary just now attracted professor-level figures, and he didn't even feel that what he said Is there anything worthy of these people coming here, after all, if you really want to search for these materials carefully, you can still find them.

Zhang Yang can be said to be a little apprehensive, a little surprised, and a little proud, but what he doesn't know is that there are some students from famous schools in his live broadcast room, and it just so happened that when he was talking today, there was a QH The student happened to be listening, and the student's teacher happened to be nearby, so he simply called over.

Then the next scene happened, Zhang Yang was actually praised by a professor, and he also said that he would come and listen!
"Uh, everyone, please don't praise me. I just read more books and searched for more information. After all, I have to work. The whole thing I said just now is mainly to pave the way for Huoyanshan. , what I want to say is wrong, I hope the professor and classmates will criticize and correct me."

He was a little apprehensive and polite, but since Zhang Yang hadn't forgotten his job, and didn't have any thoughts of playing tricks, he continued to talk, but he didn't realize that He Xiaoman next to him was already full of little stars. For He Xiaoman, the better her man is and the more people recognize her, the more proud she will be.

"Because the TLF Basin is located in the deep inland of the Eurasian Continent and is surrounded by a large area of ​​arid area, and because of this orogenic movement, the terrain in the vicinity has changed. The TLF Basin where the Flame Mountain is located is sandwiched in Bogda Between the mountains and the Kuruktag Mountains.

The humid air mass from the southern Indian Ocean is unable to enter, and the Atlantic water vapor from the northwest is blocked by the Tianshan Mountains. Due to the low terrain of the TLF Basin, the lowest point is even lower than minus 100 meters above sea level.

However, the altitude of the surrounding Tianshan Mountains is more than 4 meters. The highest point, Bogda Peak, is 5445 meters above sea level. The height difference between the mountain and the basin exceeds 5500 meters in a short distance. The basin is dry and hot.

In addition, due to the bare mountains and no vegetation cover, and the large area of ​​the Gobi Desert and the long sunshine hours, the temperature increases rapidly during the day, and the basin is like a huge pot bottom, so the hot air is not easy to escape, thus forming the world-famous latitude of 42 degrees north latitude. The stove is also the hottest place in our country.

So, in the hot summer, the exposed surface of yam can reach a temperature of 75°C under the sun, and the heat wave makes people breathless.

Moreover, due to the relatively horizontal stratum accumulation and the soft and hard rock formations, under years of rain erosion, gullies are formed along the slope, and the materials eroded from the mountain form a red alluvial fan skirt in front of the foothills. In the arid environment, countless polygonal cracks are formed, which are particularly eye-catching.

All kinds of reasons led to the appearance of the name Flame Mountain, not to mention that there was no scientific explanation in ancient times, so many people would think or exaggerate the description that this mountain is burning! "

Zhang Yang's simple and in-depth explanation even revealed the reason for the formation of the special terrain here. On the one hand, it is to improve the level of the live broadcast room, and on the other hand, it is also convenient for fans to understand more intuitively.

With the passage of time, before we knew it, it was around 9 o'clock and close to 10 o'clock, and the temperature here in the Huoyan Mountain also began to rise slowly, but it was not the weather in July and August after all. The temperature did not reach more than 40 degrees, and the temperature at this meeting is estimated to be around 4 or 5 degrees.

Although it wasn't that hot, it wasn't as cold as it was in the morning. He Xiaoman couldn't bear to take off the windbreaker he just put on earlier.

Zhang Yang himself felt a little hot. He took off his coat and hung it on the handlebar of the balance car. He was only wearing a long sleeve. Then he held the phone in front of his eyes and pretended to look at the barrage. In fact, the line of sight is placed on the virtual screen next to it. After all, it is convenient to look at the big screen.

(End of this chapter)