Chapter 499: Battle Heaven Thorn (II)

Originally, everyone didn't think that we also felt it when Dazhe said this, the temperature around it suddenly dropped sharply, and under the light of the lampholder, you could see that the stairs and walls under your feet were all frozen except for the lampholder.

"Isn't it summer now, it's more than 20 degrees outside, why is it so cold inside?" Yun Xian said that under the light, there was fog in his breath when he spoke, which showed that the temperature was already very low. Several of us girls still wear long-sleeved jackets for overalls, but almost all of the boys are short-sleeved. Dazhe was shivering from the cold, but fortunately, Uncle Lu and Sister Wang Na prepared a few sets of the kind of airtight ultra-thin overalls, which were put in handy in time. Obviously, it is possible to go back, but we may miss the answer we are seeking, and for the sake of those patients, for the sake of Dr. Chiang, who sacrificed himself, we decided to continue downward.

The temperature is getting colder and colder, and we can't see the walls anymore, it's like walking into an ice cellar.

"Can anyone explain what the situation is now? Isn't it summer? Dazhe said tremblingly.

"If I'm not mistaken, we might be in an ice cave." Yun Ximing said.

"Baidu Encyclopedia, when is the ice cave? I know about the ice holes used for fishing in winter. Dazhe said.

"In summer, glaciers are often in a state of melting. There are three types of glacier ablation: subglacial ablation, intraglacial ablation, and ice surface ablation. The Earth's crust often sends heat to the base of glaciers, causing subglacial melting. But subglacial melt is insignificant for a huge glacier. Intraglacial melt occurs when meltwater flows into the interior of a glacier along a glacial crescut. The result of intra-ice ablation. Many unique glacial karst phenomena have been born, such as ice funnels, ice wells, ice tunnels and ice caves. Guilin's stone forests are formed by karst landforms. The glacial landforms caused by the melting of the ice are similar to karst landforms, which glaciologists call karst glaciers. Yun Ximing said. He stopped abruptly after speaking. We were all led by his strange behavior and stopped. "Did you hear anything?" He asked.

"It seems to have the sound of running water." Arrow said.

"Looks like I expected it right, it's indeed an ice cave." Yun Ximing said, "And there are also very spectacular ice water waterfalls. ”

"But aren't we in the Seven Treasures Exquisite Pagoda?" Min Lan asked.

"I guess it's not that there's an ice cave in the Seven Treasures Exquisite Tower, but that the ice cave is around here." Yun Ximing said.

"What is Icewater Falls?" Yun Xian asked.

"Meltwater on glaciers, as it flows, often forms a network of small dendritic rivers that sometimes twist and meander and sometimes sink into the ice. On some glaciers with large areas of meltwater. Intraglacial rivers are particularly well developed. When rivers within the ice flow out of the end of the tongue, they often erode into deep ice caves. The entrance to the cave resembles an arch of an ancient city, either low or high. The water that flows out of the ice cave is as white as milk because of the suspended mud and sand, and the glacier is called glacier milk. When the glacier stops, walking into an ice cave is like entering a crystal palace. Some glaciers, through tunnels in ice caves, go all the way to the bottom of the glacier. Ice caves are available in single type. There are dendritic ones, and there are holes in the holes. The icicles in the cave are numerous, the ice stalactites are suspended, and the pattern of the cave is very beautiful. Some of the ice cave exits hang high above the ice cliffs. The formation of a spectacular ice water waterfall. If the temperature is high, the ice water waterfall will also flow. Yun Ximing said.

"But aren't we standing in the South? How can there be ice in this place? Sister Wang Na asked, rubbing her hands as she spoke.

"Analyzing the location of the ice cave, the area was once a karst development area in geological time. and experienced a warm and humid climate, gradually forming limestone karst caves; Moreover, the area was once a mountain glacial development area. During the Quaternary glacial and interglacial periods, large amounts of snow, glacial meltwater and even broken ice were piled up in the caves. After complex physical changes, melting and re-condensation, coupled with the continuous infiltration of atmospheric precipitation, a wide distribution of various forms of ice materials is formed in the cave, and ice caves are formed. In later years, due to the special local terrain, climate and other natural geographical environmental factors, the ice cave was effectively preserved. The formation of Ningwu Ice Cave is the result of a combination of karst and glaciation, as well as environmental factors. Yun Ximing said.

"Brother Childe, why do you seem to have seen the whole process?" Dazhe said.

"Because only such conditions can form an ice cave, and that's knowledge." Yun Ximing said.

"But how did this happen? It all feels a bit anti-science. Yun Ning said.

"It is not known at the moment, almost all the conclusions are speculation. Speculation one is that the formation of ice caves is caused by special geological formations. For this reason, our old friend, the Institute of Geology of the Chinese Academy of Sciences, also rushed to Ningwu from Beijing for investigation. However, when I entered the ice cave for the first time, I saw a very strange scene. The institute found that despite the varying thickness of the ice, all the ice was attached to the limestone, and the entire ice cave was more than 100 meters high. Although the legend of the ice cave has a history of hundreds of years, it can be speculated from the scene that this ice cave has been formed for far more than a few hundred years, almost more than a million years ago. This natural cave was formed by water more than a million years ago, but why is this cave that does not meet the conditions for freezing now covered with ice? Guess 2 is that ice caves are formed thanks to the shape of the holes. Although the geographical location and climatic conditions of Ningwu County are not suitable for the formation of ice caves, there are many external factors that can reduce the melting of ice. Because the altitude of Guanshui Mountain has reached more than 2,000 meters, and the location of the cave entrance is on the shady side of the mountain, this has played a certain role in protecting the ice all year round, and the shape of the whole cave has also played a very good role in maintaining the temperature in the cave. The hole is a positive pocket shape, so that in the summer, the temperature outside the cave is hot, the temperature at the bottom of the cave is cool, and it does not exchange. If the shape of the cave is reversed, in the summer, the temperature outside the cave is hot and the specific gravity is low, and the temperature inside the cave is cool and the specific gravity is high, and the heat needs to be exchanged, which damages the amount of ice preserved. Guess 3 is that ice caves were formed because of the glacial theory.

It is precisely because the shape of the cave is not conducive to the exchange of air inside and outside the cave, so the damage to the ice is minimized. Obviously, this is a very long process. At this time, the theory of glaciation was proposed. Scientific studies have shown that the Earth's climate has been changing since its inception. As early as hundreds of millions of years ago, there was a large-scale glacial movement on the earth, and only the glacial movement will have such a violent energy to form many geological wonders, so some people believe that it is precisely because of the glacial movement that a large amount of ice poured into a scouring hole, and it formed today's very magical ice cave. However, although the ice in the cave seems to be the same to ordinary people, after special measurements, it has been found that the age of the ice is different. The ice is also layered, and there is also a core layer, and the ice in the core is relatively old, judging by the freezing condition and some of the sediments it contains. The ice on the outside, near the mouth of the cave or near the main watercourse, is relatively new. The fourth guess is that the formation of the ice cave is a geothermal negative anomaly. If it is a glacial movement, a large amount of ice rushes into the ice cave, but over time, this ice should have melted long ago. The most important thing is that this place simply does not have the climatic conditions that freeze all year round. Some people have put forward a more recognized theory: it is called the geothermal negative anomaly theory. Geothermal positive anomaly refers to the higher the temperature of the geocentric, the temperature of the geocentric is about 6,000 degrees, which is about the same as the temperature of the sun's surface, that is, the lower the temperature, which is commonsense. Geothermal negative anomalies say the opposite: it says that the further down you go, the lower the temperature becomes, low enough to cool and produce a large amount of ice. Yun Ximing said.

"Brother Childe, although I didn't understand a word of what you said, I think what you said is too evil, you can't make it up yourself, right?" Dazhe questioned.

"Of course, it's not that I know so clearly, because this is my own personal experience, and I personally followed the researchers of the scientific expedition to explore." Yun Ximing said.

"The young master of the Yun family is young, but he has a lot of experience." Uncle Lu said, Yun Ximing waved his hand embarrassedly.

"I think let's stand on the present, how do you think we can explain standing in this scene?" Min Lan asked.

What we see now is a burial chamber, but there are no walls, almost all of them are glaciers, and the chill is terrible. We stood at the entrance and were stunned.

"What's going on? What about the said good Zhantian Thorn? It's all ice. Dazhe said.

"That's not the point, even if there is a battle sky thorn here, I'm afraid we won't be able to go down, and I'm afraid the exit will be buried under here." Uncle Lu said.

"What now? We don't have any equipment to break the ice. Min Lan said.

"No, no, no." Dazhe said and rummaged through his backpack, and he took out a box, which was full of small ****.

"How do you carry this thing everywhere?" Yun Ximing said.

"Have you ever seen someone who eats without utensils?" Dazhe said, "How about it, leader, can you get it?" ”

"Can you guarantee that you won't destroy this tower?" I asked.

"Of course." Dazhe patted his chest and said.

"Try it." I say.

"Gotcha." Dazhe said that it was neat, and after a while, a slight blasting sound came, and we were full of anticipation, but we didn't expect Dazhe to be depressed. "It's no fun, these ices really can't be moved."

"I think." Arrow suddenly said, "Could it be... And that's... Battle Sky Thorn? (To be continued.) )