How the Twin Lakes were formed, whether they were cracks in the strata or volcanic passages, it was said that there was a city under the water, and what was going on was still going on with you. Li Huan is still very confident underwater, after all, he has a storm island reef necklace protector, which can create a space to avoid water, and the underwater pills and reefback turtles are also powerful thugs and shields, even if they encounter any monsters, they really don't know which side is unlucky.

Thinking of this, Li Huan made up his mind: "Although the story you tell is very beautiful, it's useless, you can choose now, either go to the front to explore the way, or I will kill you now, choose yourself." ”

Frank said that this story was just to dispel Li Huan's idea of going to the Twin Lakes.

Since Li Huan's thoughts have not been dispelled, they have no other choice, between dying immediately and dying again (or not dying later), they will definitely choose the latter. And after thinking about it, Leila's mother and daughter Li Huan decided to let Leila's mother rest in the fortress where she spent the night yesterday, her legs and feet were inconvenient, and it would be more troublesome to take her.

"Sir, please make sure to keep her safe. Leila's mother said.

"Rest assured, I'll take care of Leila, she's just showing the way, and when I get to the Twin Lakes, I'll let her go back the way she came. Li Huan explained to Leila's mother.

She has now figured it out, and after holding the 35,000 euro bill yesterday, she no longer wants her daughter to live in a volcanic village for the rest of her life. The fate of living a life in a village in the volcanic area is really not much better than death. Moreover, the Sea Serpent Gang has died here, and they will definitely come to retaliate often in the future, so everyone's life will be even more sad.

In addition, she witnessed Li Huan's skills, and under Li Huan's protection, her daughter's safety should not be a problem.

As for Leila, the girl didn't seem to be too scared, but there was excitement in her eyes—both men and women at this age were curious grades. Hearing such a magical story, not to mention that there should be no danger with Li Huan protecting her now, even if there is no Li Huan to protect her, it is estimated that she will quietly go to find out.

After deciding on the next action, Li Huan started the jeep and drove in the direction of the volcano with three Sea Serpent gang hooligans such as Leila and Frank.

The military base is connected to the volcano by a concrete road, and after walking along this road, you can see the culprit who destroyed everything around it in 69 years - the relatively low of the two volcanoes, the volcano called Hailar. Now this volcano has no temper at all, it is as quiet as a girl, but although this mountain is less than two hundred meters, and there is no sign of eruption, Li Huan does not dare to underestimate it.

As long as it's a volcano, it's one of the scariest things on the planet, this thing is quieter than anything if it doesn't erupt, but when it does, it's more irritable than anything else, and absolutely no one can afford to mess with it. And although the volcano is quiet now, look at the bare hills around it - you must know that this island has been covered in volcanic ash, and fertile volcanic ash is the best fertilizer, and think about the lush greenery you have seen along the way, and compare it to the barrenness here, which is enough to show the horror of this volcano.

The concrete road skirts the foot of Hailar Volcano, makes a sharp bend and continues forward.

Li Huan looked at this terrifying volcano while driving, although he knew that it would not erupt suddenly, but he still secretly prayed in his heart that there would be no "what if", otherwise it would be difficult to get out of the volcano in the face of the volcanic eruption. Continuing along the road, you soon came to a flat hinterland between the two mountains.

Here, the concrete road is completely broken.

"After the eruption, the road here was cut off, and the only way to go up was on foot. Leila jumped out of the car: "It's about an hour's walk to the Twin Lakes." ”

The group said they would go.

In fact, Frank and the others have been to the Twin Lakes a long time ago, and it seems that the terrain is more familiar than Leila recognizes, and there are many dangerous "lava shells" that Leila doesn't know, and Frank and they will always take the initiative to avoid them. Later, Lyra simply didn't remind her, she just followed the hooligans of the Sea Serpent Gang step by step in front of her.

There was a black cooled lava blanket all over the place.

Lava is a typical landform formed when a large amount of magma erupts from a volcano and flows in all directions along the ground. When the eruption is large, the magma can be spread out to cover a large area of ground and then condensed. The lava that forms the lava cover is generally mafic lava, because the mafic lava has a small viscosity and fast flow speed, and the acidic and neutral lava flow slowly, a few meters per hour, more than ten meters, and it cools while flowing, and the lava cover is formed.

After the natural cooling of lava, the surface is wave-like, rope-shaped, and block-like, which is called quilted lava, and when it is cooled by water or rain, the hot lava forms an ellipsoid or pillow-shaped, which is called pillow-shaped lava. In addition, since the cooling shrinkage of lava often forms fissures on the vertical cooling surface, the lava is divided into multi-faceted cylinders called columnar joints, and if you look at these forms of lava, you can imagine what the lava was once flowing.

For the natural trap of "lava shell", Li Huan has not seen it. At Li Huan's request, Frank picked up a stone on the ground with a strange look, and after scanning the surroundings for a while, he slammed it in one direction, only to hear a crisp sound of "click", and the surface looked like black cooling lava with a luster, but from the smashed shell, dark red magma flowed.

Only then did Li Huan know why the lava crust was so dangerous.

If one doesn't pay attention to stepping into it, he won't even have time to protect his spiritual energy, and he can be burned to bone slag, and under the power of nature, Qi Refiners are not 100% safe.

After walking for a long time, he passed the lava cover area, and a lake with a diameter of about five hundred meters, glowing blue, but dark at the bottom, and completely layered, appeared in front of Li Huan.

"Lord Wizard, this is the Twin Lakes. Frank said.

Li Huan looked at it, where is this lake, it is clearly a blue hole!

Blue hole, as the name suggests, means the blue cave, will automatically emit blue light, far away in the ancient Roman era, some people ran to the blue hole to explore, may be "to false" relationship, finally, it was said that "the blue hole is the base of contemporary witches to cultivate themselves and cultivate their spirits, training magic", so that the true appearance of the blue hole has not been known, and has always been covered with a veil of mystery. Its types include marine blue holes, land blue holes, and blue holes in many parts of the world.

Blue holes are divided into land blue holes and ocean blue holes.

The water quality in the terrestrial blue hole is generally divided into freshwater layer, hydrogen sulfide layer and oxygen-free layer from top to bottom. The water in the freshwater layer is drinkable, and the water in the hydrogen sulfide layer contains a large amount of hydrogen sulfide metabolized by microorganisms, which can corrode human skin. Although the oxygen-free layer cannot preserve the muscles of animals, the carapace skeleton can be almost perfectly preserved, so it is also called a natural history museum by the paleontological community.

The Ocean Blue Hole is a huge "deep hole" that suddenly sinks to the bottom of the sea. Its name comes from the fact that when viewed from above the surface of the sea against the surrounding waters, this "deep hole" of the seabed appears dim and has a mysterious deep blue hue. The lack of a water cycle does not support marine life, but the Ocean Blue Hole is of great scientific value, and scientists have found many ancient fossil remains in the Ocean Blue Hole.

And all blue holes have one characteristic, that is, almost no one has ever been to the bottom.

Li Huan walked around the blue hole, tested the water with his hands, put it in his mouth and tasted it, slightly salty, although not as bitter as seawater, but definitely not freshwater, which illustrates a problem, this blue hole is neither a freshwater blue hole, nor a seawater blue hole, but a mixed cave system, which is the most complex kind of terrain.

"First

Sheng, this water can't be drunk......" Leila saw Li Huan tasting the water in the lake, and couldn't help but remind.

"Oh, what's so special about this?" Li Huan was stunned, although there was a salty taste in the water, it was not so bad that he couldn't drink it.

"The people in the village say that there are gods living in this lake...... Well, I don't know what's going on. Leila hesitated: "Anyway, the people who used to live in the military base came here to get water, but they were all sick." ”

Li Huan was stunned for a moment, sent a sub-machine to dive into the water, and the analysis of the water composition was instantly given on the virtual screen, which made Li Huan breathe a sigh of relief. There is nothing wrong with the water source, there are no suspicious components, it is a mixture of normal fresh water and sea water. As for why he got sick, Li Huan thought for a while and got the reason, although most of the water here is freshwater, it still contains seawater. Long-term consumption of seawater can cause a great burden on the kidneys. Moreover, Li Huan also found a large number of metal components in the water, which may be due to the geological landforms of the surrounding active volcanoes.

"It's okay, as long as you don't drink too much, I'll wait and prepare to go down and take a look......" Li Huan groaned for a while, and let the child machine dive to a deeper place, first take a look at the situation below, he is not an inexperienced rookie, as the saying goes, the mountains do not deceive the water, and the water becomes a ghost, although he has complete underwater skills, but safety first can never be forgotten.

"Oh my God, are you going to go into the water, are you going to go down to the Twin Lakes?" Leila was visibly taken aback.

"Well, I'm going to go down and have a look, you don't have to worry, I dive a lot. Li Huan nodded.

The temperature and hydrological conditions of this blue hole are just right for the activities of Xiao Maruko and the reefback turtle, Li Huan believes that even if there is any danger below, it is really impossible to let the reefback turtle take the lead, and he can retreat safely.

Unlike Lyra's expression, several of the Sea Serpent gangsters clearly had imperceptible surprises on their faces. Their idea was simple, and while none of them knew what the hell was in the Twin Lakes, one thing was for sure, there was danger down there. Since this wizard is going to find death on his own, then they are also free......

However, Li Huan obviously wouldn't let them have such a good time.

"You guys, come and stand. Li Huan pointed to the small open space beside him.

"Don't worry, Lord Wizard, we won't run!" Frank and the others swore at once.

"I'm really sorry, I'm not at ease at all, so I'm going to wronged you. Li Huan's eyes flashed, and Frank and the others felt the sky spinning again, and then they all fell to the ground. After putting down Frank and the others, Li Huan looked at Leila and said, "You just wait here, don't just walk around, these guys won't come to their senses until I make them sober...... By the way, you have this gun, and if there is any beast, you can shoot it to scare it away. ”

After speaking, Li Huan took out a pistol from the virtual space and handed it to Leila, asking, "Will you use it?"

Leila shook her head blankly.

Li Huan taught her hand in hand: "Look, pull the sleeve first, so that a bullet will be pressed in, look at the center from this gap, and then shoot the gap in the center of the eye." It's not a big problem if you don't hit it accurately, if it's a wild beast, the sound will scare the beast away. ”

After speaking, Li Huan moved his body and confirmed that the Storm Island Reef Necklace was still opening the enchantment normally, and he was ready to jump underwater.

Before the man could jump, he let Leila grab him.

"What's wrong?" Li Huan asked back.

Leila thought for a while, took off a black transparent diamond-shaped stone necklace from her neck and handed it to Li Huan, and said seriously: "Kind sir, this is what I picked up by the Twin Lakes, it has always brought me good luck, and I hope to bring you good luck." Don't worry about me, I'm familiar with the terrain around here, if any beasts come I'll shoot them away, and you must come back safely!"

Li Huan's heart was hot, this little girl she just met was quite concerned about herself: "Don't worry, there are many things in this world that can kill me, but there is absolutely nothing that can trap me." You're just waiting here, I'm going into the water. ”

After speaking, Li Huan plunged down the blue hole with a fierce son.

As soon as he plunged down the blue hole, the Storm Island Reef Necklace immediately opened the water-avoiding barrier, and after Li Huan adapted to the gravityless state that had been sinking, he connected the lens of himself who had dived before. He took out a lot of lighting sticks from the virtual space, broke them and threw them down, and then began to descend slowly. Although the machine has dived for nearly three hundred meters and still has not yet explored the bottom of the Blue Hole, Li Huan has a storm island and reef necklace and is not too worried about the depth, so he lets himself float down slowly.

At this time, in the virtual screen, Chen Xue and Fiona were also online.

Chen Xue saw the blue hole in Li Huan's field of vision and exclaimed: "It's so beautiful, Brother Huan, what kind of place is this!"

"The Twin Lakes are a blue hole, and I'm going to the bottom right now. Li Huan said.

"Blue Hole, I've never seen such a beautiful place, the name is so apt!" Chen Xue sighed.

"From the outside, it's beautiful. The volcanic quilt just now is also beautiful, but it's a pity that you little lazy worm got up late and didn't see it. Li Huan said with a smile.

Whether the blue hole is dangerous or not is one thing, just talking about the geological environment, the first 50 meters can be called beautiful. Viewed from the sky, the Blue Hole looks like a blue wreath blooming on a black lava cover, with a turquoise blue periphery and a black stamen in the middle. Due to the special structure of the cave entrance, sunlight can be directly projected into the cave from the cave entrance, so the water inside the cave is crystal blue and mysterious, and even the rocks inside the cave have turned blue. At about 50 meters, the ecological environment is also very good, and you can see schools of fish swimming leisurely in the water. This blue hole is connected to the sea outside, perhaps due to the influence of the tide, which is sometimes silent and sometimes surging.

However, this has nothing to do with Li Huan, and the Storm Island Reef Necklace makes him completely unaffected.

"Master, are you taking a bit of a risk like this?" Fiona raised her worries in addition to looking at the scenery: "After all, we don't know what's in the Blue Hole...... This kind of cave is very easy to form a unique ecosystem. ”

Fiona's words are very scientific, and the translation is easy to understand, that is, it is easy to encounter unknown creatures in the blue hole. And one of the biggest differences between aquatic and terrestrial creatures is that if they live long enough, they can become very, very large in the absence of gravity. It is indeed dangerous to encounter large unknown creatures.

"Well, you don't have to worry about this, I have thugs to help. Li Huan said simply: "And I think that as long as it is a blue hole, it should be a good sign, do you know how scientists determine why the Mayans died out?"

On the virtual screen, the two girls shook their heads together to indicate that they didn't know.

"It's the answer found in the Blue Hole, in the Blue Hole in Belize. Li Huan said.

Belize Blue Hole, a lighthouse reef on the edge of the submarine plateau in Grand Bahama Shoal. The circular entrance is surrounded by two coral reefs. The shape of the Belize Blue Hole is circular, with a diameter of more than 300 meters and a depth of up to 200 meters. During the Ice Age, the cave served as the entrance to a dry cave system. After the glaciers melted and the sea level rose, the cave was flooded and became a sacred place for many brave divers. Today, the Blue Grotto is known for its sponges, barracudas, corals, angel fish, and a school of sharks that patrol the cave's edges.

"How did the Mayans perish, and what happened to a blue hole on the sea?" Chen Xue was curious.

Even Fiona showed a curious expression at this.

Anyway, it was slowly diving, and Li Huan simply gave the two of them popular science.

"Because the Blue Grotto is a museum of nature's time, the water body of the Blue Grotto is very stable and suitable for the preservation of various as well. Citigroup scientists took some sediment samples from the bottom of the Blue Cave in Belize and compared them with sediment samples from limestone craters in the interior of Belize and found that during the decline of the Mayan civilization, the two elements of aluminum and titanium in the land samples were significantly reduced, and the content of titanium in the samples was low, indicating that the number of tropical cyclones was lower than in the past, and the drought was longer than before. ”

"The Yucatan Peninsula, where Belize is located, is a water-scarce region, and the ancient Mayans mostly relied on rainwater stored in limestone pits to survive periods of drought. However, prolonged droughts may have depleted stored drinking water. A water crisis is followed by famine, instability and war...... Climate change and drought have led to the decline of many ancient civilizations. Not only the Maya, but also the Akkadian Empire in the Middle East, ancient Egypt, and the Moche culture in Peru were all affected. ”

"It is precisely because of the preservation properties of the Blue Hole that scientists were able to find comparative samples and finally determine that the decline of the Mayan civilization was caused by water shortage and drought, so if there was a civilization here, then I can definitely find something under the Blue Hole. Li Huan said.

Unconsciously, Li Huan's diving depth has reached 300 meters, although he can still see the light above his head, but the light can no longer reach such a deep place. The hole, which is hundreds of meters in size, is now the size of an egg, and this is where the members of the Sea Serpent who were once attacked by the "monster" have reached.

Li Huan raised his vigilance, and at the beginning he threw the few lighting sticks that could no longer see the light, and he took out a few more to fold them, sweeping away the surrounding darkness.

There is no alarm from the handset, which means that the following is still safe.

It was very troublesome to look with his eyes in this kind of place, and Li Huan simply launched his spiritual power to explore the surroundings. As soon as the spiritual power was deployed, Li Huan found that there was indeed something abnormal here.

About thirty meters under his feet, there was a layer of black mist, which seemed to be a spiral-shaped spider web, the density seemed to be lighter than the fabric fibers, and it shimmered with silver light, quietly suspended in the darkness. Seeing this layer of "cobwebs", Li Huan was stunned for a moment, and then understood what had killed the three divers. There are no monsters under the blue hole at all, at least there are no man-eating monsters like Frank said, and it is these "cobwebs" that kill the three divers.

These "cobwebs" are hydrogen sulfide, a toxic precipitated gas produced by the decay of bacterial colonies and organic matter. If the gas is unprotected, the diver will feel itching or tingling in the skin, or dizziness. The worst thing is that this gas is corrosive, and even a full-coverage heavy wetsuit will corrode. When the wetsuit is corroded, these gases pass through the skin and through the lungs into the metabolic process, which can even lead to decay if the body has too high a level of this gas.

Although it is generally not, it is at 300 meters of water, the water pressure causes hydrogen sulfide to form a precipitate, and the corrosive toxicity is naturally incomparable, and inhalation of this gas can lead to insanity and death. The diver who shouts "monster" on the walkie-talkie must have been delirious by the large amount of hydrogen sulfide gas.

The high concentration of hydrogen sulfide gas precipitates is also due to the natural environment of the Blue Hole. Because there are no tides in the Blue Hole, the chemical composition of the water here is very clear – a thin layer of freshwater seawater mixture covers the water layer, and this layer of freshwater acts as a "seal", isolating the water layer below from the oxygen in the atmosphere, and inhibiting bacteria from causing organic spoilage. Bacteria immediately beneath the freshwater layer feed on sulfate, which then produces huge amounts of hydrogen sulfide. If you think of the entire Blue Grotto as a glass tube, it is a cocktail with a wide range of colors.

After solving this mystery, Li Huan's heart relaxed a little, there are no man-eating monsters, it must be a good thing.

With the protection of the storm island and reef necklace, when Li Huan passes through the hydrogen sulfide precipitation layer, he will not be polluted at all, but the thick hydrogen sulfide layer is like thin mud, it looks fine from a distance, flashing with silvery-white light, and when he really enters the hydrogen sulfide layer, it will be very disgusting. Those things that shimmer silver-white are microbial corpses that have been precipitated for an unknown number of years, and the Storm Island Reef Necklace can isolate water, but not gas.

Although the Qi Refiner would not be affected by hydrogen sulfide, the smell still made Li Huan's face turn blue.

"It's so sour. Li Huan released several aura shocks in a row, so in the face of the pressure of more than three hundred meters of water depth, where can the energy of the aura impact force out all the flavor, after descending nearly fifty meters, Li Huan has not penetrated this layer of sediment, he began to complain: "How can this layer of sediment be so thick, even if there is really an undersea city, it will be buried by it, right?"

Thinking that he was going to look for Atlantis in such a foul environment, Li Huan retreated in his heart.

"No, the hydrogen sulfide layer is only medium by weight...... If it's a high concentration of seawater, it's heavier than hydrogen sulfide, so there must be something else underneath this layer. Fiona thought for a while and said, "Actually, there has always been a guess in the natural science community, master, do you know where the deepest place on earth is?"

"Needless to ask, of course, the Mariana Trench. Li Huan said.

The Mariana Trench, also known as the Mariana Trench, reaches a depth of 11,034 meters and is located at the bottom of the Pacific Ocean near the Mariana Islands in the northeast of the Philippines, from Iwo Jima in the north to Yap Island in the southwest. It has the Aleutian, Kuril Island, Ogasawara and other trenches in the north, and the New Britain and New Hebrides trenches in the south, with a total length of 2,550 kilometers, an arc, and an average width of 70 kilometers. It is estimated that the trench has been formed for 60 million years. It is the deepest known part of the earth, and it is one of the harshest areas on earth due to high water pressure, complete darkness, low temperatures, low oxygen levels, and a lack of food resources.

If the world's highest mountain, Mount Everest, is placed at the bottom of the ditch, the summit will not be able to expose the water. Many mountaineers have successfully conquered Mount Everest, but it is extremely difficult to explore the deep sea. In January 1960, scientists took the "Trieste" deep-sea submersible for the first time and successfully dived to the bottom of the Mariana Trench for the first time for scientific investigation, and only then did they "reluctantly" find out the trench.

"Actually, no, there was a speculation in the natural science community that the bottom of the trench discovered by Trieste was actually a layer of hydrogen sulfide deposits, because it was too thick, so it was regarded as silt on the seabed by scientists at the time. Many mainstream scientists estimate that there is actually a body of water beneath the hydrogen sulfide deposits. Fiona said.

"That's impossible, there's an atmospheric pressure of up to 1100 at that depth, and everything can be crushed together, and the temperature is so low that there's no way anything can survive down there. Li Huan said.

"Not necessarily, the hydrogen sulfide layer is in a precipitated state, and it has good thermal insulation properties...... The undersea volcano has turned the waters beneath the hydrogen sulfide layer into more than 20 degrees of life-friendly waters, and over the years, it may have even evolved into another ecosystem. Fiona finished explaining, and finally concluded: "But all this is just speculation, I only thought of this when I saw this hydrogen sulfide layer, maybe the master you will see a new world through it." ”

"Well, then I'll give it a try......" Li Huan heard Fiona explain and sped up his diving.