Suppose the desert 'sand' is dug away, what will appear underneath? After reading it at a glance

As we all know, the earth is the homeland 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 that are not suitable for human survival, such as mountains and deserts. And what I want to introduce to you today is the desert. Everyone knows that there is more than one reason for the formation of deserts. In addition to drought and lack of water, it is also closely related to the wind blowing in nature. They will blow yellow sand everywhere. Therefore, if human beings If the desert is not treated, the area of ​​the desert will gradually expand. Some time ago, a netizen raised a very interesting question on the Internet. If all the sand in the desert is hollowed out, what will appear underneath? After reading the knowledge increase!

Of course, this is only 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 most likely existence is rock or rock debris. If we go further down, we will be presented with hard bedrock, which is the bottom layer of the desert, no different from the rest of the earth.

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