We stood on the top of a mountain more than 1,000 meters high, with an unobstructed view of the terrain within a radius of dozens of kilometers. The red cliffs stretch endlessly, and nature is as naughty as a naughty child in the vast plains to tree clusters of block-like peaks and forests, high or low, dense or sparse, or like a tangled warrior standing with his hands in his hands, which makes people awe-inspired, or like a slender lady trembling and making people look at it.

I didn't want to appreciate the beauty of nature, my mind was just thinking about the evolution of this terrain, and if I understood it, it might help us find the huge cave as soon as possible. Nearby, a few red cedars grew straight branches from the crevices of the rocks, and the green on the branches seemed to show its vigorous vitality. This cedar tree is similar in shape to the known cedar, but the leaves are different, so let's call it red cedar. Its branches swayed in the breeze, and it didn't know if it was watching us or getting us off the planet as soon as possible.

I looked at the rocks beneath my feet, and my eyes were full of red quartz sandstone, and large and small joints covered the top of the cliff, which was weathered over time. Xiao Chen walked around the top of the mountain, Xiao Zhang simply sat on the cliff, he had been searching for almost a morning today, and everyone was a little tired. There are too few birds dedicated to reconnaissance, and it will take the day after tomorrow to establish a holographic map of the entire planet at the earliest, and you can't be idle in these two days, you can only find out if there is any special terrain first, and there is no place for a living mecha like this kind of technology, except for the necessary personnel to garrison, the other team members are all dispatched.

"Captain, you said where the rebels' last secret base would be, and looking for it like looking for a needle in a haystack." Xiao Zhang lowered his mask, looking distressed.

"Look for it slowly, if you can't rush it, you must pay attention to the details, a broken tree, a trampled grass may tell us the answer."

"Captain, you are a top student in geography and engineering, but Xiao Chen and I are not studying geography, do you have any suggestions for guidance!" Xiao Zhang simply took off his headset, combed his hair with his hands, and stood next to me and laughed. This guy is starting to be a little indecent again.

"Come less! Do you think that geoengineering will learn what kind of material this stone is, and geoengineering mainly learns which planets can be used for development, which planets are suitable for development, and which planets are suitable for building space carriers, and choosing the most suitable settlement on a planet, etc. I scolded, picked up a small red stone on the ground and said, "See, this rock is quartz sandstone." I know this because I also have a great interest in geology, and if you see any rocks in this plain that aren't red rock, let me know. ”

"It's that simple!"

"Simple! It's very simple, you can wait for something to eat and look for it for me, and if you can't find a rock that is not red, don't come back. ”

"Isn't it! Captain. What about the two of you? ”

"The two of us are standing here and watching you find it!" I said it deliberately viciously.

At this time, Xiao Chen walked over, patted Zhang Yang's shoulder and said, "The captain is joking, we will also look for it." ”

"That's pretty much it!" Zhang Yang also suddenly realized: "I thought I would be a coolie!" ”

"That's it!" I looked at these two teammates who had experienced this tragic war together, and said with a smile, "We'll have something to eat later, and we'll split up after eating." It's going to be faster. ”

I sat casually on a rock and took out my own military rations, which were braised pork ribs rice. I crushed the self-heating block at the bottom of the bag, and after a few minutes, the bag bulged, and I saw that it was almost there, and tore open the bag. The fragrant rice is very appetizing. As I ate, I was thinking about what to do next, and the hot food made people feel much better. When I finished eating, I folded the bag and stuffed it into my grocery pocket.

"Hey, Captain, what are you doing with the bag?" Xiao Chen was still eating, and asked strangely.

"Oh, you'll take the bag back with you when you're done."

"Why?" Xiao Chen asked again.

"A bag can tell you a lot of things sometimes, if you throw a bag today, if you get an order to come here again in a few months to kill the remaining enemy troops, and you find a food bag while searching for the enemy troops, then you know whether the bag was thrown here by yourself or by the enemy."

"Oh! Captain, do you mean that we can also find the enemy's lair through traces of life such as household garbage? Xiao Zhang suddenly realized.

"Yes, in short, when we go our separate ways, we must pay attention to some small links, and don't let go of any clues. Success or failure often depends on the details. ”

"Yes, Captain."

After eating the delicious field food, the three of them went their separate ways, divided their own scope of action, and agreed to contact them as soon as there was any special situation. I flew in the sky like a little bird, and for this search operation, I added an additional glider on the back of the mecha, which saves energy more and reduces the speed, otherwise it will be much faster if you want to fly with a backpack, and too fast will not be conducive to the search for enemy troops.

I stopped in a valley where many unknown trees grew different from the peaks, and there was a stream that flowed slowly through the woodland, and the water of the stream was clear, and the bottom of the stream was mostly gravel, with sharp edges and few round pebbles. I picked up a few small pebbles and looked closely, but I could still see that they were quartzite, so I let the pebbles go back to its home.

I walked upstream along the stream, this valley was relatively narrow, about 200 meters wide and 50 or 60 meters narrow, with upright quartz sandstone towering on the side, and the difference in height of a few hundred meters made the narrow valley completely in the shadow of the mountain peak, and the bare face felt extremely cool. Step by step, I walked in the primeval woodland, and the dense or sparse vegetation was trampled under my feet, gradually forming a faint line in the woodland. I carefully tried to find similar lines, or traces of the past, and as long as I found them, there was hope.

After searching for nearly half an hour, this valley naturally seems to have never appeared with intelligent creatures, and I am the first, it seems that I am going to change places. I took to the skies again and headed farther away, and this quartz-sandstone field was not supposed to be a secret base for the enemy. The peaks began to thin out, and I entered the area where the peaks and plains alternated, where the peaks were much greener, and the vegetation began to grow taller from semi-desert to humid areas. There is a small river running in the low field, like a goddess of nature who has left a ribbon here. The creek grew wider and wider, but after a while, it gradually disappeared into a forest, and gradually the dense forest blocked my exploration of the river from the sky, and I flew down.

There are many forests here, and it is not easy to get down, so I picked a shallow beach by the small river and stopped. The shallows have no large trees except for a small shrub, and a large area of beach rocks is exposed. Finally, the rocks of the river beach are not all red sandstone, but other rocks. I sat on a slippery rock, picked up stone after stone and looked at it again, it looked like granite rather than quartzite, and the river left a deep mark of time on the hard granite beach.

I looked into the distance, and there were a few round rocks protruding from the flat rocky beach, which stood out for the attention of today. I walked over, and the protruding stones were less than a meter high, round one by one, and one or two of the bottoms had been hollowed out by the river, like a stone egg moving here from afar, not like it had grown here in the first place. There is also a stone egg broken a large piece, the broken part is also very round, like a big egg originally contained a lot of small eggs, but now the small egg has been taken away, forming several circular holes, and revealing the texture of the layers inside, the thickness of each layer varies in more than ten centimeters, and a small piece can be dug out by hand, which shows that the erosion is more serious.

Strange, I muttered to myself, if it is the effect of flowing water, the stone egg should not appear layer upon layer of flaky texture! It should not be broken into holes, flowing water is always gentle, and violence is not liked by it. I can guess the formation of this stone egg, it should be on a huge granite base, the surface of the stone is divided into small pieces by water flow or other actions, and then eroded and honed into pieces of stone eggs. I put away the piece of flake crushed rock that had been dug up, and somehow I always felt that it would be useful.

I summoned Zhang Yang and Xiao Chen to see if they had found anything, and the reply was disappointing, although they found different rocks like me, but this different rock could not tell us that the huge cave would be there. Didn't have a clue. I looked at the broken stone eggs again, and there were a few ants that had burrowed into the narrow gap between the layers, and I thought it was its home. Looking at these little creatures, it suddenly occurred to me that compared to the universe, human beings are weak ants!

I flew away from this rocky beach, continued to fly at high altitude, and successively found several rock formations that were not red sandstone, and when I went down to look, I found that it was also a granite structure, but the weathering and water erosion were more serious. Nature is always incomprehensible, even in today's highly developed technology. Quartz-sandstone formations are interspersed with granite formations, which should still be rare.

I found another granite formation, which was a small hill about ten meters above the ground, and the rock was not broken like I had found before, it was in the shape of a regular round mound, and there was not much of the surface outcropping, most of it was covered by vegetation. Not far from here, there is a small lake in the shape of a narrow shape, which is tens of thousands of square meters. I don't want to enjoy this beautiful place, I believe that there is not a big cave underground, otherwise how could there be a lake?