Chapter 283

After listening to the previous introduction, few students may be surprised:

No, kripp rock just doesn't exist on the earth. Why is it necessary to have something to do with the moon to find this rock in the world of Mo?

Can't it be that the Da Mo boundary also conforms to the generation conditions of kripp rock and evolved by itself?

This leads to the particularity of kripp rock:

This is a special rock that needs to meet the conditions of near earth gravity and enough elements to be correctly generated.

At present, human beings have only found kripp rock on the front of the moon near the earth.

First, let's talk about the reasons for the formation of the moon.

At present, there are many kinds of speculation about the cause of the formation of the moon, and no one can give an exact answer to this question.

Because for what happened billions of years ago, we can't go back to that point in time and prove and falsify a hypothesis.

We can only approach the scene through the existing facts.

The existing key observation and detection facts include the following:

The average density of the moon (3.34 GCM ^ 3) is much lower than that of the earth (5.52 GCM ^ 3) and other earth like planets.

The overall chemical composition of the moon and the earth is very different. For example, the moon is more deficient in volatile elements and iron loving elements than the earth.

The earth and the moon have the same oxygen isotopic composition.

The oldest highland igneous rock on the moon is about 4.5 billion years old, indicating that it was formed or differentiated at almost the same time as the earth.

There are four hypotheses about the formation of the moon:

One is the theory of splitting from the earth.

The second is the binary theory as a sister planet formed with the earth.

The third is the capture theory that stars formed in another part of the solar system are captured by gravity.

Finally, the collision between the original earth and a celestial body the size of Mars, resulting in the accumulation of debris to form a large collision theory.

At present, the generally accepted model is the big collision theory, that is, the fourth one.

This hypothesis holds that 4.5 billion years ago, a planet named Theia, about the size of Mars, fled near the earth's orbit due to gravitational fluctuations and had a violent impact with the earth.

At that time, the earth suffered an unprecedented disaster. The whole was blown up and reorganized. The degree of destruction was stronger than the impact of the extinction of dinosaurs. I don't know where to go.

Part of the silicate and debris from the earth's impact stayed in orbit around the earth, and these materials finally gathered to form the moon.

A key data supporting this model is the current angular momentum of the Earth Moon system, with a specific value of 3.35 × 10^41g·cm^2s。

Considering that some rare students fail seriously, there are not many bodies here. In short, this data can be pushed to an almost identical heritage model.

At the same time, it is precisely because of this angular momentum and the material structure produced by impact that the krip rock has the formation conditions.

In other words, krip rock can be considered as a rock formed by the fusion of many elements in a specific planetary environment.

If you change a planet and mix the same elements, you can't recover this kind of rock, and some can only produce other substances.

The same elements are like the outline of a work, and the planetary environment is the author.

You let Chendong write the same outline, that is, the momentum is grand. The two supreme masters fight to the end of the universe, and even the avenue is trembling. They order tens of thousands of dollars for the first time every minute.

If it were written by other servants, it would be a third rate white text for primary school students to fight. I'm afraid it's difficult to even sign a contract.

That is commonly known as writing, or "that flavor" in "that flavor".

So kripp rock is a kind of rock that can only be generated under the Earth Moon system. You can't find it on Mars or Jupiter.

And kripp rock can appear under the deep pit

This shows that either the great Mo world and the three main sequence stars directly have the same Earth Moon system as the moon, or there are other deeper reasons.

Meanwhile, Feng Yuhua on the ground continued to popularize relevant information to Lin Ziming:

"Colonel Lin, the particularity of kripp rock is not only its formation conditions, but also its characteristics."

Lin Ziming looked at Feng Yuhua and asked curiously:

"Oh? What's it like?"

Feng Yuhua took a deep breath and explained:

"Colonel Lin, based on the analysis of the thermal model established by the mainland for the interior of the moon, we can determine one thing.

That is, the radioactive decay of potassium isotopes, thorium and uranium in kripp rock may have provided a heat source for volcanic activity on the front of the moon for billions of years, that is, it is a rock that can produce heat. "

as everyone knows.

Due to the tidal locking effect, only one side of the moon can face the earth. Traditionally, we call it the front of the moon.

People standing on the earth will never see the other side, that is, the back of the moon.

Only by flying there or with the help of a probe around the moon can we see the mysterious world.

The front of the moon is relatively flat, with a large area of moon sea, which is the shadow we usually see on the moon.

The back of it is full of small craters, which looks like the king's face.

The reason for this phenomenon is simple:

On the front is where Chang'e lives, which is relatively flat. On the back is where the moon rabbit lives. There are rabbit Baba everywhere... Cough.

Well, seriously.

There are two reasons why the front of the moon is flat. First, tidal locking leads to the front facing the earth and the back facing the vast universe. Therefore, the back is hit by meteorites more often.

For this reason, the back of the moon is like a knight. In order to protect the princess and the prince from falling in love, he blocked all the hidden arrows shot at them with his own body

This is really a sad story.

In addition to the above reasons, another reason is that there are many volcanoes on the front.

When the basalt on the front of the moon is ejected, it will flow on the front of the moon in the form of magma, burying those craters.

Like the make-up technique of one of Asia's three great magic techniques, the pit is blocked by "foundation".

Mentioned earlier.

Kripp rock is a brownish yellow glassy mineral rich in potassium, rare earth elements and phosphorus.

besides.

There are also radioactive elements such as uranium and in the moon's krip rock.

They decay over a long period of time, releasing heat.

The reason for the large number of volcanoes on the front of the moon is that there is a zone called storm ocean kripp rock area on the front of the moon.

The special elements contained in krip rock provide sufficient heat energy to the volcano during decay.

In this way, new problems arise:

Without exploring why there is kripp rock under the deep pit, its ability to provide heat energy alone is doomed that the temperature under the deep pit will not be too low.

Don't say it can have dozens of degrees, at least it can't be below zero.

So where is the heat that should have existed?

You know, the energy level of this energy is not a small number.

If the pit with a depth of at least 100000 meters is krip rock, the energy level accumulated over the years may not be lower than the power of 100 big Ivan!

This magnitude is enough. Some countries that don't live well and like ghost worship have sunk the island several times.

However, the question belongs to doubt. At present, the information Lei Wenjun can collect has reached a certain limit.

Further down, regardless of whether the headquarters agrees or not, the low temperature below zero is not a situation he can resist.

If you want to continue exploring, you have to go on some other machines.

Machines have both advantages and disadvantages.

Although the machine can go down to a deeper position, it's impossible to imagine Lei Wenjun's ability to analyze rock characteristics by hand.

But there's no way. Many things can't be done both ways.

Thinking of this, Lin Ziming turned around and said to Feng Yuhua:

"Assistant Feng, please talk to director Lei so that he can be ready."

Feng Yuhua nodded. As soon as he was ready to contact Lei Wenjun, Lei Wenjun suddenly came through the messenger and shouted:

"Colonel Lin, I have found a new situation!"

Lin Ziming immediately grabbed the communicator and asked:

"What's the situation? Are people in danger?"

"People are fine, but I found... A turtle!"