What s like at the bottom of the desert? Are there any research results?

After research, it was found that the lower layer of the desert is the first layer of rock structure, and the lower layer of these rocks is the underground dark river, and the formation of the desert is mainly caused by geological changes, resulting in the sinking of lakes and oceans.

So the desert is hollowed out, what is underneath? If we remove the sand, then the world below may be very exciting, like opening a "blind box", seeing all kinds of different landforms, it may be black and brown land that has not yet been completely desertified, or it may find groundwater or oil and gas, etc. I have to admire the miracle of the earth's creation, even though the desert looks so arid on the outside, it actually contains rich groundwater, oil and gas resources.

These resources exist because the desert was once an oasis and a civilization before it was formed. Some researchers have suggested that the abundant groundwater beneath the Sahara Desert may have come from the last great ice age, when the waters gradually receded and eventually became deserts as Africa's climate changed.

How are deserts formed? China's largest desert in **?

There are a lot of deserts in the world, the amount of vegetation in the desert area is very small, and then these areas will be covered by sand, in addition, the rainfall in the desert area is also very small, the air is particularly dry, and there will be more or less rocks under the sand The formation of the desert is mainly inseparable from the action of the wind, due to the continuous erosion of the rocks by the wind, eventually these rocks become sand, and then the sand continues to move forward with the wind, and the area of the desert continues to expand, and then the desert is formed.

When it comes to the largest desert in China, the Taklamakan Desert in Xinjiang is located in the Tarim Basin of Xinjiang, the whole desert has been in a state of flow, the annual precipitation here can not even reach 100 mm, when it is less, the annual precipitation is only four or five mm, in the Taklamakan Desert the wind blows up the sand, the phenomenon of forming a sand wall is very common, and the sand dunes in the desert are also constantly advancing with the wind, after entering the Taklamakan Desert, It's hard for people to get out.

In the process of governing the desert, China adopts the way of planting vegetation to block the continuous expansion of the desert, in order to control the desert, the sand control people have studied a lot of sand control methods, such as grid sand control, which is to divide a small square with straw and other items in the desert, and then fix the sand in place, and plant a variety of plants that can survive in the desert. Through the efforts of generations of desert control people, the area of deserts in China has been greatly reduced, and many places in China have been freed from the state of full of sandstorms, and the desert control work will continue to be carried out to ensure that our lives will not be affected by sandstorms.

The reason why the desert is formed is because of the degradation of the ecological environment, because there are fewer green plants, so it will lead to a lack of water resources and some things that block the wind and sand, so the land is buried by the wind and sand, covering the formation of a desert; The largest desert in China is the Taklamakan Desert, located in the center of the Tarim Basin in southern Xinjiang.

The climate is arid, the wind is strong, there is no vegetation on the surface, and people cut down forests and trees, destroying the grassland, and the land surface loses plant cover, so the desert is formed; The largest desert in China is the Taklamakan Desert.

Deserts are formed because of the depletion of resources and the effects of weathering over a long period of time. The largest desert in China is the Taklamakan Desert.

The plane crashed in the desert and you can choose five items from 15 items: water, lighter, rope, food, medicine.

Desert, the full name of sandy desert, refers to the ground is completely covered by sand, plants are very scarce, rain is scarce, and the air is dry.

In addition to natural formation, it can also be formed due to irrational farming, overgrazing and other reasons. The desert is home to occasional mineral deposits and oil deposits, few inhabitants, and a dry climate that favors the preservation of human artifacts and earlier fossils, making it a popular destination for archaeologists.

Key Benefits:

Desert refers to a sandy desert, and one-third of the Earth's land mass is desert. Because there is very little water, the hall is generally considered to be a desolate and lifeless desert, and it is called "barren sand". Compared to other areas, there is not much life in the desert, but if you look closely, you will find that there are many animals hidden in the desert leaky lead, especially those that come out at night. Return to good.

Desert mainly refers to a barren area where the ground is completely covered with sand, plants are very scarce, rainfall is scarce, and the air is dry. Deserts are also known as "sand curtains", areas where there is a shortage of water and few plants. The desert area is mostly sandy beaches or sand dunes, and rocks under the sand are often found.

Some deserts are salt flats and completely devoid of vegetation. Deserts are generally aeolian landforms. There are sometimes valuable mineral deposits in the desert, and many oil deposits have been discovered in recent times.

The desert is rarely inhabited, and the resources are relatively easy to exploit. The desert has a dry climate, and it is also a happy place for archaeologists, who can find many human artifacts and earlier fossils.

The Chinese name is desert.

The foreign name is desert

Pinyin. shā mò

Note. Synonyms Gobi.

Antonym oasis.

Another name. The sand curtain is centrally distributed.

Central Asia, northern Africa, western North America.

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One-third of the Earth's land is completely covered with sand, and vegetation and rainwater are very sparse. Due to the scarcity of water, deserts are generally barren and inaccessible. Although there is not much life in the desert compared to other lands, there are still many plants hidden in it, and there are animals that only come out at night.

Deserts are generally wind-formed, and most of them are sandy beaches and dunes, and there are often rocks under the sand. In addition, the soil in the desert is very thin, there are few plants, and some deserts are still salt flats, and there is no vegetation at all.

Although the distribution of plants in the desert is relatively small, there are still many species, such as desert red willow, which are resistant to drought or salt. It also rarely rains in the center of the desert, and the desert is often fed by rivers that flow from the nearby mountains, and although these rivers carry a lot of earth, they dry up after a day or two of flowing in the desert. But occasionally it rains in the desert, often in torrential rains, and at this time, the normally dry rivers fill up quickly and are prone to flooding.

If there is enough water in the desert, seasonal lakes are formed, which are generally shallow and salty. Because the bottom of the lake is very flat, the wind will blow the lake away for dozens of square kilometers, and when the dry lake dries, a salt flat will be left.

There are also several strange phenomena in the desert, and mirages are one of them. A mirage is a natural phenomenon formed by the refraction of light, that is to say something that is ethereal and does not actually exist. The mirage can be seen occasionally in the desert, it is the true embodiment of another space, reflected in another space under the movement of matter.

Mirages often occur after rain due to the high humidity of the air at this time, which forms a lens system.

When the temperature near the ground in the desert changes drastically, the density of the atmosphere varies greatly, and the distant scenery causes a mirage when the light is propagated, abnormal refraction and total reflection occur.

The mirage is divided into upper, lower and lateral mirage, the sand and gravel in the desert are hot by the sun during the day, and the air will rise quickly when approaching the sand layer, thus forming the temperature distribution of the upper layer is cold and the lower layer is hot, and the density of the upper layer is greater than that of the lower layer. The light of the scene in front of you will be refracted by the dense penetrating air to the less dense air, thus forming a mirage. Viewed from a distance, it looks like a reflection in the water.

If a person is thirsty in the desert and sees a mirage, he will mistakenly think that he has found an oasis, but after a gust of wind, the scene disappears again, and it is nothing more than a mirage.

Although the mirage is beautiful, desertification is caused by natural drying factors and excessive animal husbandry, so keeping the land moist can only be reversed by allowing the moisture retention to be greater than the dryness.

Quicksand simply means that sand can flow like a liquid, that is, sand that can flow. is a natural phenomenon. It often occurs in deserts with unstable foundations, when a heavy object is placed on top of the sand, as if it sinks to the bottom, sinking to the bottom.

2. Sandstorms.

It is a general term for both sandstorm and dust storm, which refers to a severe wind-blown sandstorm weather phenomenon in which a large amount of sand and dust materials on the ground are blown up by strong winds and dust materials on the ground and rolled into the air, making the air particularly turbid and the horizontal visibility less than 1,000 meters. Sandstorms refer to sandstorms formed by strong winds blowing a large amount of sand into near-surface formations. A dust storm is a storm formed by high winds that sweep large amounts of dust and other fine particles into the air.

3, "gravel circle".

It is a large stone that has been broken again and again after hundreds of years of thermal expansion and contraction, forming a circular circle of gravel on the ground, which is very much like a work arranged by man, and is actually formed naturally.

4. "Wear a leather jacket in the morning and wear yarn in the afternoon".

Because the specific heat capacity of the stone is large, the temperature difference between day and night changes drastically. It was cold in the morning and hot at noon. However, the coastal area is close to the water, the specific heat capacity of the water is larger, and the same amount of solar radiation is also affected, and the water has to absorb more heat and release the heat at night.

5, "The Sea of the Devil".

The sun is scorching during the day, and the sand and gravel absorb heat quickly, and the air close to the ground heats up quickly and has a low density, while the upper air heats slowly and has a high density. Whenever there is no wind or breeze, because the air is not stirred, the heat exchange between the upper and lower air is very small, and the abnormal phenomenon of cool and dense air in the upper layer and hot and thin air in the lower layer appears.

According to statistics, the desert area on the earth is 15.35 million square kilometers, accounting for the land, and China's desert area is 1.16 million square kilometers, accounting for the national land. And the number is growing.

So, how did such a large desert come about?

Conventional wisdom holds that deserts are a product of the arid climate on Earth. The Sahara Desert in North Africa, the Victoria Desert in Australia, the Thar Desert in South Asia, and the Rukahari Desert in the Apaib Peninsula are all concentrated between 15° and 35° north and south latitudes of the equator. This is because the rotation of the earth has caused these areas to be shrouded in the downdraft of the atmospheric circulation for a long time, which destroys the process of rainfall, creating an arid climate and creating a vast desert.

However, this theory does not explain the origin of all deserts, such as the Thar Desert, which is humid and watery above, and when the southwest monsoon comes, the air contains almost as much moisture as a tropical rainforest, but it is covered with sand. Researchers in the United States believe that dust is the main cause of desert formation. But where does the dust come from?

Some scholars point out that the dust in the Thar Desert was originally caused by humans, and later the desert increased its density. So some people propose that human beings are the real ones who destroy the ecological environment and create deserts.

In 1957, archaeologists found 8,000-year-old petroglyphs in the Sahar Desert, and later found broadleaf forest species and fossils, proving that much of the Sahara Desert was once a fertile land of lush vegetation in ancient times. Later, due to the destruction of the original ecology by human beings, deserts were formed, and drought only provided suitable conditions for the formation of deserts.

It is believed that the formation of the Sahara Desert was slow at first, and it was not until 5000 BC that the overwhelming yellow sand flew in from nowhere, turning it into a vast desert.

It is also believed that the improper exploitation of nature by humans will certainly degrade the grassland forest into a desert, but the desert itself has become an ecological type that existed long before the emergence of humans.

Who made the desert? Is it humans or climate? Or did humans and arid climates work together to create deserts? Researchers still need to continue to explore.

The formation of the desert comes from the human use of fire, the use of gunpowder, chemical pollution, industrial heat, nuclear tests and cell phone signals, etc. Since the use of fire by humans, the temperature of the earth's surface has been out of balance. Plain freshwater is evaporated into clouds that remain in the atmosphere for a long time, rainfall gradually decreases, and the melting of polar ice replenishes only the oceans.

As a result, the high temperature and waterless zone of the continental plate appears, the vegetation withers, and the monsoon blows up the fine soil, which is absorbed by the low-lying vegetation and the ocean. The sand and gravel were left to form a desert, and with the development of science and technology, the heat increase gradually expanded.

Many deserts are the result of a combination of factors.

Deserts are supposed to have been formed by the uplift of the ocean in ancient times. This is because the bottom of the sea is a place where sand accumulates. When it became land, the floating soil was blown away by the wind, leaving sand behind, and the current desert was formed.

Some people say that deserts are the result of excessive deforestation of vegetation by humans. But in ancient times, humans were not capable of turning oases into deserts.