Assuming that the desert 'sand' is dug away, what will appear underneath? It's clear after reading

As we all know, the earth is the home on which we humans live. At least for now, humans cannot leave the earth without finding a second planet of life. But everyone also knows that although the area of ​​the earth is vast enough, relatively speaking, the living space occupied by human beings is not much!

After all, the land area on the earth is only 29%, and among them, there are many areas such as mountains and deserts that are not suitable for human survival. And what I want to introduce to you today is the desert. We all know that there are more than one reasons for the formation of deserts. Apart from drought and water shortage, there is also a great relationship with the wind blowing in nature. They will blow the yellow sand everywhere. Therefore, if humans If the desert is not controlled, the area of ​​the desert will gradually expand. Some time ago, a netizen asked an interesting question on the Internet. If all the sand in the desert was hollowed out, what would appear underneath? After reading it, I have increased my knowledge!

Of course, this is just a hypothetical question. After all, there are still relatively few people in this world who have nothing to do to dig deserts, and the answer to this question does not necessarily have to be obtained by digging. First of all, we all know that the surface of the desert is sand, and these sands are basically the products of rock weathering, so it is not difficult for us to know that under the sand, the rock or rock debris is actually the most likely to exist. If we go a little further down, what we see in front of us is the hard bedrock, which is the bottom layer of the desert, which is no different from the rest of the earth.

Of course, depending on the geographical location, there may also be oil or gold mines under these bedrocks.