"I don't know if you know about these scenic spots in our country, they have a common name called 'Tiankeng Crack'. ”

Let the drone avoid him, Zhang Yang picked up a new set of clothes that He Xiaoman threw down from above just now and changed them, and then sorted out the protective clothing he had just taken off, and put it into the backpack that had just fallen off with his clothes, and then reappeared in the live broadcast room and asked everyone in the live broadcast room a question.

At this time, the rope left by the rescue team also slowly fell from above this time, and at one end of the rope was tied a bundle of dry firewood, which was Zhang Yang's standing dry firewood prepared on the RV, in order to be in case of emergency, in situations such as rain or outdoor barbecue, there was no need to run out alone to find just now, and this time it can be said that it brought warmth to him who had just climbed up from the icy river.

It was already winter, and it was still snowing, although there was no wind underground, but it was cold enough under the cracks, coupled with the water vapor and cold brought by the long-lasting underground river passing by, it further lowered the temperature of this underground, which was similar to the wet cold in the south, even if Zhang Yang had changed into a set of dry clothes, he felt so cold that he shivered.

took out the fire sickle brought by Han Xiuwen last time, and after an easy operation, under this dark and deep underground crack, this place that had never been patronized by humans began to have a 'living' breath, or that the appearance of fire in primitive society accelerated human beings into civilized society, and the constantly jumping flames brought wisps of high temperature, which also simultaneously dispelled the cold on Zhang Yang's body, and it could bring a sense of security in this dark underground.

After the initial tension of Zhang Yang being accidentally killed and falling to the crack in the ground, and the righteous indignation after the betrayal of the relatives of the rescued person, Zhang Yang's question also interrupted the endless barrage full of anger in the live broadcast room, and let everyone reshift the topic to the normal rhythm of the live broadcast room.

"I know the sinkhole, there are many such pits in our mountains, and when you are small, if you are not careful, some sheep will fall into it!"

"The Xiaozhai Tiankeng in Xiaozhai Village, Xinglong Town, Fengjie County, Qingzhong County, is considered one, and this is also known as the 'first pit in the world', but how is this kind of sinkhole formed?"

"It's the first time I've heard the term sinkhole, could it be that God stabbed a hole out of the earth when he was unhappy?"

"Then I want to ask what was used to poke it out? Hehe, that hole is pretty deep!"

"Don't drive, it's science time!"

"Come on, come on, call up my surveillance, you drivers hurry up and confess leniently, otherwise you will be strict with resistance!"

"If you confess, you'll be lenient, but I still like to resist the strictness after that!"

"Poof, if you don't agree with each other, you will drag rac, what is wide and tight, people don't understand. ”

However, Zhang Yang obviously underestimated the superb skills of these old drivers in his live broadcast room, and he didn't forget to show their superb driving skills whenever and wherever he wanted.

"Well, don't always get on the highway, I've been holding on to it lately, although it's really exciting for you to sneak around when it's tight, but I recommend that you come when it's relaxed, at least there's no jerky feeling when you're driving on the road!"

The lights on the drone have been turned off, and at this time, the raging fire is constantly jumping in this dark underground crack, like an elf, the firelight reflects on Zhang Yang's serious face, looking at his indifferent expression, but the people in the live broadcast room don't buy it, you don't let us drive, but I swished on the highway.

He Xiaoman, who had already returned to the living room of the RV, was lying lazily on the sofa, looking at the serious expression on TV, listening to his words full of connotation, and couldn't help but smack.

"Shameless, all the driving skills of those people in the live broadcast room were brought out by you, and I was embarrassed to ask everyone not to drive, hum ╭ (╯^╰) ╮ I scared yoga again today, and I won't be allowed to eat delicious food at night to see how I expose you!"

But he said that Zhang Yang had a vague connotation here, although Chaoguan was his own family, but he still had to be restrained, so he coughed lightly and continued.

"Ahem, uh-huh~~ Okay, okay, get back to business, just a few people are right, what I said about the sinkhole is the scenic spot that those friends said.

You can imagine that when you are walking in the continuous mountains in the southwest of our country, suddenly a huge pit appears in front of you, and the cliffs around this pit are very steep, like axes and machetes, and the pit in the middle of the cliff is like a big mouth facing the sky, lying across the mountains.

I have to say that you can feel this strange natural landscape just by imagining, which is what we commonly call 'Tiankeng', which is a magical attraction and warning left by nature to human beings.

This kind of sinkhole usually has a huge volume, surrounded by steep rock walls, deep into the surface characteristics of wells or barrels, sinkholes are generally in the soluble rock formation with a particularly large thickness and a particularly deep groundwater table, generally from the ground to the underground, the average width and depth are greater than 100 meters, and the bottom is connected to the underground river.

To say that the sinkholes in the world are actually mainly distributed in our country, as well as Oslo, Mexico, Slovenia and other places, and in the southwestern provinces of our country, sinkholes have been repeatedly found, and when the veil of these sinkholes was first unveiled, it was really a sensation in the world, which is not an exaggeration. ”

In fact, Zhang Yang just wanted to describe the underground crack he was in at this time through these, of course, only through the sinkhole that everyone is more familiar with can be extended to what he is going to say next.

"But speaking of the sinkhole and ground fissures are actually because of geological disasters to form, some of them have also appeared there since ancient times, when we currently take these sinkholes and fissures as scenic spots to visit, but we don't know whether it is because of collapse, erosion formed by the sinkhole, or surface rock, soil cracking under the impact of natural or man-made causes of the formation of ground fissures, in fact, are the gradual formation of geological disasters.

As I just said, these places are no longer magical and beautiful attractions, but also nature's warning to human beings, because there will definitely be a series of gradual disasters in the future, such as this kind of ground fissure, which is a geological disaster that has to be prevented, but fortunately, scientists have mastered the preliminary methods to solve this kind of problem. ”

The bundle of firewood sent down from above was about to burn out, but at this time, Zhang Yang was no longer as cold and shivering as he was at the beginning, but his body was warm, and he raised his feet to extinguish the firewood that still came out of the fire, and got some soil from the side to cover the spark directly, preventing a fire that seemed a little impossible underground.