Qian Xiaohao took a piece of bone and said, "This thing looks like the gustibule bone of a fish. If it weren't for the tiny bone spurs or not curved, I would have suspected it was the bone of a snake. Do you think it was some fish like eels?"

"It's still the same question, how did they appear here?" Yu Shan asked.

Qian Xiaohao said: "It turns out that someone should have lived here, right?"

Yu Shan nodded. Someone must have lived in such a large underground palace here, and those halls and circular cave rooms similar to yurts may have been artificially rested, so it is not surprising that some people live here.

"I hope there is nothing else. If a carnivore really catches the fish underwater and brings it back here to eat, then we will be in trouble." Yu Shan said with a wry smile.

"What do you do if you think so much? Haven't we encountered nothing now?" Qian Xiaohao said.

Yu Shan thought, it was right. They were not in any danger now. Besides, if there were really people here, there should be no danger in these underground rivers.

"Let's go! No matter whether there is danger or not, this place is not a good place. Let's leave first." Yu Shan made a decision immediately.

The two of them kept exploring the halls, trying to find another passage. When they came, neither of them planned to leave.

"Yushan, come here quickly." In just a while, Yushan heard Qian Xiaohao's screams.

Yu Shan followed the sound and passed the pile of night sand and entered a hall. As soon as he entered, he saw Qian Xiaohao shouting with a strong flashlight shining on his head.

"Look at the top of your head, what is that?" Unlimited information came from Qian Xiaohao's voice.

Looking at the mountain, the entire cave became colorful under the light.

"There are also some of the things in the back. You see, these halls are full of these things. They won't be just ordinary stalactites, right?" Qian Xiaohao said while checking.

Yu Shan also reacted at this time: "There should be some ores, simple stalactites will not be so brilliant."

In these halls, there are a wide range of stalagmites and stalactites, especially under the light, the reflected light is colorful and dazzling.

Not far away, the walls and flowing stones were all emitting strange lights, and there were shining golden stone walls like gold, translucent white stalactites like jade, stone flags...

This is the most beautiful space in the entire cave system discovered by Yu Shan and Qian Xiaohao.

"This is the wall flowing stone!" Qian Xiaohao sighed.

Qian Xiaohao explained it, and Yu Shan realized that the wall flow stone was deposited by calcite and other minerals formed by flowing water (including intermittent water flow) in the cave.

Due to the different base shapes and water flow states, various forms can be formed, and their representative edged stones, stone curtains, stone flags, calcium plates, etc.

Calcium carbonate deposits formed by flowing water in the cave. The top flow stone formed on the top of the cave is called the top flow stone formed on the wall of the cave, and the bottom flow stone formed on the bottom flow stone formed on the bottom flow stone.

"It's really not simple here." Qian Xiaohao sighed in the end.

Yu Shan asked strangely: "Why isn't it simple? It's not a landscape here, so people come to visit. What's the use of being beautiful?"

Qian Xiaohao looked at Yu Shan strangely and said, "These things are more than just beautiful."

This cave has a hole of 2 meters wide, with a widest place of 4-5 meters and a height of 3-5 meters. It is better to say that it is a cave here, but it is a hall with obvious traces of artificial rest and rest.

There are not many general stalactites in the cave cavity, only one cave on the east side, the stalactite wall flow stones and stone flowers are deposited, white and transparent, and the length of the cave is about 200 meters.

"What do you think this is? Is it an animal fossil?" As soon as I entered the cave, Yushan discovered an abnormality in the cave. Yushan had seen dinosaur fossils, so he could still recognize the fossils. What's more, the fossils in this cave seemed to have been artificially rested and could be seen at a glance.

"It's definitely an animal fossil. I just don't know what these are useful. How can they be protected so well?"

Qian Xiaohao was a little strange. This place might be the old nest of Tiangui. In such a place, it was really not worthy of his appearance of these ordinary things.

If the ghosts and monsters appear here, Qian Xiaohao is not surprised at all, but it would be too boring to appear some stalactites, wall flow stones, and fossils.

Just a little check, I found that there were a large number of animal fossils in the cave. Perhaps because it was useless, there was no further excavation. The animal fossils that have been sorted out are all on the cave walls on both sides of the cave, looking like reliefs, and looking scary.

After wandering around, the two found a passage to other places. Following the passage, Yushan discovered that the cave had a remaining structure, with a land and water passage of about 4,000 meters.

The cave is tall and empty, with stalactites hanging in the air, with novelty inside and numerous branches. From top to bottom, they have discovered six layers. The entire cave is majestic, with unique landscapes and interconnected layers.

"Huh? My compass has a spiritual reaction, it's different from the cave above." Qian Xiaohao held up the compass and checked carefully.

"There is no source of spiritual energy, nor spiritual objects. The one that emits spiritual energy is actually the cave wall? How is this possible?" Qian Xiaohao carefully searched for the source of spiritual energy through the compass, but found the cave wall.

"I heard that some caves have radioactive substances, will there be radiation?" There are many underground caves in Taicheng, and Yu Shan has visited them, so he knows that some caves will have radiation, which is also considered an energy reaction. Now Qian Xiaohao has confirmed that it is the spiritual energy emitted from the cave wall, so there is a great possibility that it is radiation.

"I can feel that this kind of spiritual energy is good for people, it cannot be radiation." Qian Xiaohao shook his head and said.

Yu Shan sneered: "Radiation is all harmful to the human body? I heard that the unique conglomerate tectonic angle can emit low-volume gamma rays, that is, gamma rays. This ray has excellent effect on promoting blood circulation in the human body and preventing colds. There is this ray in the underground cave not far from our Taicheng, and maybe it is the same here as there."

"Forget it, we don't have time to test whether it is gamma rays. No matter what it is, it's enough to be good for the body. This is also an important gain of our adventure." Qian Xiaohao was embarrassed by Yu Shan's words and immediately surrendered.

The two of them were hiking around. Fortunately, Qian Xiaohao's compass measured the direction, so the two of them did not lose their direction, and they were able to determine the location they were in the underground of the cave they had discovered for the first time.

Finally, the two explored eight halls, which means that this cave that runs through the upper and lower parts consists of eight halls.

Among these eight halls, there are large areas of water, and there are also various accumulations such as stalactites, stalagmites, stone curtains, stone pillars, etc., which is a grand view.

These halls have different styles. The first hall is exquisite and transparent, and it is colorful under the lights. The second hall is majestic, the third hall is realistic in image, and the fourth hall is like entering a fairyland.

The lower you get, the larger the area, especially the lowermost hall, which has a large area of ​​complex lever stone dam. The lever stone dam is a small terraced ridge dam formed by rapid deposition of a large number of crystalline travertines in slopes or valleys.

The Fuban border stone dam is a layered stone ridge border dam that looks like terraced fields. It is spectacular at first glance. Even if Yu Shan and Qian Xiaohao are used to the magnificence of the underground, they have to sigh.

The two of them walked around the scene without going deep into it. Every time they found a hall, they would not go in and observe, but just poked out the passage and continued to explore down the passage, so the two of them explored very quickly.

When they returned to the top floor, the two of them were already very tired. They found a flat place to sit down and rest. There were pavilions, towers, stone tables and benches, and garden nurseries.

Of course, these are all made of stalactites, not real pavilions and towers.

"How come nature is magical?" Yu Shan said in amazement.

Qian Xiaohao smiled and said, "Humanity is even greater. I believe that if no one rests, the tidying will definitely not be so beautiful."

"It's a pity that I'm in the dark. If I had arranged circuits here and connected all lights, I really don't know what it would be beautiful." Yu Shandao.

Qian Xiaohao smiled and said, "I'm afraid no matter how beautiful it is, few people dare to come down to visit. This place is not something that ordinary people can enjoy."

"Yes! If I hadn't sealed the underground Yin River, we wouldn't have explored here for a long time." Yu Shandao.

When talking about the underground Yin River, Qian Xiaohao said: "Do you know how these things are formed? They are formed by gravity water deposition. For example, dripping stones are formed by discontinuous water flow - dripping water. From dripping point to landing point, they mostly form corresponding deposition, which is these stone pillars. This is standing dripping stones, such as stalagmites, stone pillars, and dripping cups, with their cross-sections stacked.

There are also some hanging drip stones, such as goose tubes and stalactites. The cross-sections are concentric and circular, and the drip stones and flowing stones are formed by continuous moving water flows. Calcium carbonate is deposited in caves.

The sediments have strip-shaped, flow-layered, and ring-shaped structures, with various sedimentary forms, mainly including Tianliu Stone, such as meat strip stone, jellyfish stone, stone belt, stone flag; wall flow stone, such as stone curtain, stone waterfall, cave shield, shield tent, cave board, stone pillar plate, etc.

Below are the bottom flow stones, such as the flow stone dam, stone terraces, flow stone slabs, hole cakes, hole beads, hole balls, etc., as well as splashing water deposits. Cave drips and hanging flow water often splash out the calcium carbonate carried by water droplets and water mist, and the deposits attached to the first-formed substances can be called palm slices, stone grapes, stone mushrooms, stone petals, stone corals, etc. according to their shape.

The most amazing thing is the deposition of pool water. When the pool water at the bottom of the cave does not overflow or dry up, various pool water sediments are formed. The sediment forms include water surface forms, such as water calcium films or cave rafts, floating ice, cave bubbles, edge stones, stone flowers, underwater forms, such as crystal flowers, crystal brushes, stone grapes, moon milk stones, stone corals, cave beads, etc..”
Chapter completed!