"The Tertiary Period, which is the old name of the Paleogene and the Neogene, but this geological epoch is no longer officially recognized, and has been split into two periods: the Paleogene and the Neogene.

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

Let's not talk about this, after all, we are not professional in this, just listen to it, the main focus is on the incident I am talking about, that is, the Himalayan orogeny, which is mainly divided into three acts.

The first act takes place from the end of the Eocene to the beginning of the Oligocene, when the sea water completely withdrew from the Tibetan Plateau, accompanied by strong folds, faults, and intrusions of neutral magmatic rocks.

The second act, which occurred in the early Miocene, has strong folding, faulting, magmatic activity and metamorphism, etc., forming large-scale thrust faults and overthrust structures, resulting in large uplift of the earth's crust and magmatic intrusion.

The third act, from the Pleistocene to the present, is mainly characterized by the sharp uplift of the plateau, the large subsidence of the surrounding basins, and the continued activity of the old faults, with Quaternary volcanic eruptions in some areas.

In fact, it was during this period that the Indian plate finally collided with the Eurasian plate very intimately after a long journey, so that the entire eastern part of the Eurasian plate was once again squeezed in a north-south direction.

Under this violent squeezing, the Himalayas and the Qinghai-Tibet Plateau rose rapidly, and then there were various topographical changes, such as the Himalayas, the Brahmaputra River, the Tianshan Mountains, the Tanggula Mountains, the Hoh Xil Mountains, etc., which even extended to the direction of the Great Khing'an Mountains. ”

Zhang Yang's sudden burst of scientific popularization, and even threw out a lot of professional terms, which made people sound a little dizzy, even if the people in the live broadcast room were a little unpleasant to listen to, and felt a little boring and incomprehensible.

"emmm scumbag said he didn't understand!"

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

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

"I heard that someone is talking about geography and history here, and I came here to study history at QH, and I said that I was very excited to hear it!"

"BD's report is good, decisive attention, small gifts are not a tribute. ”

"I heard from the students that there is an anchor talking about the Himalayan orogeny, and I will listen to the old man!"

"Wow, it's Professor Kang, it's actually Professor Kang from our QH side, haha, Brother Yang, you're too cowhideous, you actually attracted the professor!"

"Emmmm, isn't this an entertainment anchor?

Even Zhang Yang himself was taken aback, not to mention those fans in the live broadcast room, he didn't know what was going on, his explanation just now actually attracted professor-level figures, and even he didn't think that what he said was worth coming over, after all, these materials can still be found if you really have to check them carefully.

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

Then the next scene happened, Zhang Yang was actually praised by a professor, and said that he wanted to come and listen!

"Well, don't praise me, I just read more books, look up more information, after all, it's also a job, just said such a big paragraph is mainly to pave the way for the Flaming Mountain, I want to say that there is something wrong, I hope the professor and students will criticize and correct it." ”

was a little frightened and polite, but since Zhang Yang hadn't forgotten his work, and he didn't have any ideas such as getting an axe in the class, he continued to talk, but he didn't find that He Xiaoman next to him was already full of little stars, for He Xiaoman, the better his man is, the more people recognize him, the more proud she is.

"Because the Turpan Basin is located deep inland in the Eurasian continent, surrounded by a large area of arid areas, and because of this orogeny, the terrain in this vicinity has changed in various ways, and the Turpan Basin, where the Flaming Mountain is located, is sandwiched between the Bogda Mountains and the Kuruktag Mountains.

The moist 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, and the lowest point is even lower than minus 100 meters above sea level due to the low terrain of the Turpan Basin.

However, the altitude of the surrounding Tianshan Mountains is more than 4 kilometers, of which the highest point is Bogda Peak with an altitude of 5445 meters, and the height difference between the mountains and the basin is more than 5500 meters in a short distance.

In addition, because the mountains are bare, there is no vegetation cover, and the Gobi Desert has a large area and long sunshine hours, which makes the daytime temperature rise rapidly, and the basin is like a huge pot bottom, and the hot air is not easy to dissipate, and then the world-famous furnace on the latitude of 42 degrees north latitude is also the hottest place in our country.

Therefore, in the hot summer, the temperature of the bare surface of Huaishan can reach 75 °C under the sun's baking, and the heat wave rolls over, making people breathless.

Moreover, due to the relatively horizontal accumulation of strata, coupled with the soft and hard rock layers, under the erosion of rainwater for many years, a ravines are formed along the slope, and the material eroded down by the mountain forms a red alluvial fan skirt in front of the foothills, and the front edge of the fan skirt forms countless polygonal cracks in the arid environment, which is particularly eye-catching.

This is why the name Flaming Mountain appeared, not to mention that there was no scientific explanation in ancient times, so many people will think or exaggerate that this mountain is burning!"

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

With the slow passage of time, it has slowly come to 9 o'clock and close to 10 o'clock, and the temperature here in the Flaming Mountain has actually begun to rise slowly, but after all, it is not the weather in July and August, and the temperature has not reached more than 40 degrees, and the temperature is estimated to be about 4 degrees or 5 degrees.

Although it wasn't that hot, it wasn't as cold as in the morning, and He Xiaoman couldn't help but take off the windbreaker he had just put on before.

Zhang Yang himself also felt a little hot, he took off his jacket and hung it on the handlebars of the balance bike, wearing only a long sleeve, and then took the mobile phone in front of him and pretended to look at the barrage, in fact, his eyes were on the virtual screen next to him, after all, the big screen is convenient to watch.