Liang Peng shook his head and said thoughtfully, "The mineral content in the water is indeed problematic, but it's not enough to support a mineral deposit."

Xia Chujian said, "What's the problem?"

Liang Peng said, "Captain Xia, please look at these three sets of data."

As he spoke, he laid out the data he had just measured for the upstream, midstream and downstream.

"Especially the content of this mineral..."

Liang Peng pointed to a set of data on the instrument and continued to explain to Xia Chujian, "This mineral is generally found in higher concentrations deep in the Earth's crust."

"This Green Star has an atmospheric environment very similar to the habitable planets in the Beichen system, so I infer that its geological structure should be similar."

"So under the same circumstances, the mineral content deep in the crust should be similar."

Xia Chujian understood: "So you think that if the groundwater is normal, the content of this mineral should be highest in the upper reaches, second highest in the middle reaches, and least in the lower reaches?"

Liang Peng said: "That's what I mean."

"But current data shows that the content of this mineral is completely absent in the upper reaches, with the highest content in the midstream and the lower reaches."

"That goes against common sense."

Xia Chujian said, "Let's go and see the specific conditions of the upper, middle and lower reaches of this stream."

They took the exploration robot Xiaofei and looked around the upper, middle and lower reaches of the stream.

The creek is very small indeed.

They walked a short distance into the valley where they were before and reached the upper reaches.

Because there is actually a pool of water inside the valley.

The pond is not large, but the water is like black jade, with just a hint of green, reflecting the green trees on the nearby mountains.

There is even a small waterfall on the mountain, as white as snow, rushing down from the top of the mountain and pouring into this small pool.

But the water in the pool showed no sign of overflowing.

The waterfall splashes like jade, and the water drops fly onto the face, making people shiver with cold.

Xia Chujian and Liang Peng observed here for a while.

Liang Peng said: "The water in this pool should mainly come from underground, it is groundwater."

Xia Chujian looked up at the tall mountain and said, "This mountain is so high and so big, but the waterfall is so small."

"Look at this thin stream of water. Is it as thick as a chopstick?"

Liang Peng said: "Yes, it is because the water flow of this waterfall is too small to support the area of ​​this pool."

"So I judge that the water in the pond here is mainly groundwater."

"Then the water from the pond flows out from this low-lying area and forms a small stream like this."

Xia Chujian said, "This stream is small enough. The mountain is so big, it extends all the way to the middle of the stream, right?"

Liang Peng said: "Yes, this mountain should be a secondary mountain range extending from the main mountain range on the island. Its scale is also amazing."

Xia Chujian nodded, continued walking down the mountain road, and soon returned to the middle reaches.

This place is half mountains and half grassland.

Further down, it's all grass.

After walking out of the valley for a while, you can see the end of the stream, where it merges into another larger river.

The river is surging and connects to the ocean at the other end.

The entrance to the river is, of course, the downstream of the stream.

The middle reaches of the stream are naturally between the two.

Xia Chujian followed Liang Peng for a walk and returned to the place where they were just in the middle of the river.

That is the edge of the grassland where the deer hoof prints Xiaofei discovered disappeared.

Xia Chujian looked at the stream and said thoughtfully, "Maybe there is a reason."

Liang Peng asked curiously, "What did Captain Xia come up with?"

Xia Chujian pointed at the stream and said, "...Do you think there's a possibility that there's a fault here? So more groundwater is flowing up from here, causing more minerals in the middle reaches?"

“Because the fault is in the middle reaches, the upper reaches are not affected?”

Liang Peng nodded thoughtfully: "It's very likely."

"If there is a fault in the middle reaches, it can indeed explain the abnormal data."

“Groundwater seeps into the midstream and then flows downstream.”

"When it reaches downstream, it will be diluted, so the content is lower."

Xia Chujian said, "The mineral content anomaly has been explained, but if there really is a fault here, it's invisible to the naked eye. Do you have any equipment to measure it?"

Liang Peng said: "I don't have a fault-measuring instrument. That kind of instrument is too large to carry around..."

Before he finished speaking, the exploration robot Xiaofei slid over and said, "Xiaofei, you can try."

As it spoke, its mechanical arm stretched out, and the tip turned into a thin drill bit, then drilled down to the middle of the stream.

Liang Peng stared at the exploration robot with eyes wide open, his eyes revealing irrepressible joy and envy!

If he could get this exploration robot to help him, he could do even more exploring!

…

Just as Xia Chujian and Liang Peng were investigating the abnormal mineral content in the stream with the exploration robot Xiaofei, Qiu Zijun brought his team to the depths of the mountains in the east.

As soon as they arrived here, they ran into the treasure hunting team from the Fifth Military University of Zangge Star.

That team was numbered Treasure Hunt Team 7, and Qiu Zijun and his team were from the Second Military University of Kanli Star, numbered Treasure Hunt Team 4, second only to Teams 1, 2, and 3 of the First Military University of the Empire.

Qiu Zining followed her cousin Qiu Zijun and wanted to show off.

But after walking for more than an hour, they didn't find any rare plants and became impatient.

At this time, they saw that the members of Treasure Hunt Team 7 were blocking the entrance to a mountain road and not letting them in, which made them even more unhappy.

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