What is the reason for the formation of Yuncheng Salt Lake?

Yuncheng Salt Lake Yuncheng Salt Lake was formed in the fourth generation of the Cenozoic period. As the mountains moved out to the sea, a large number of salt-containing minerals gathered here. After long-term precipitation and evaporation, a natural salt lake was formed. In the feudal society, the salt tax from Yuncheng Salt Lake once accounted for one-eighth of the national fiscal revenue and made a significant contribution to the survival and reproduction of the Chinese nation. Yuncheng Salt Lake is comparable to the world-famous Dead Sea in Israel. The black mud in the lake contains seven major and sixteen trace elements. You can go boating in the lake, and the black mud in the lake can beautify your skin and rejuvenate your skin. Therefore, Yuncheng Salt Lake is known as the Dead Sea of ??China. Yuncheng Salt Lake is the third largest sodium sulfate inland lake in the world, covering an area of ??132 square kilometers and has a development history of more than 4,000 years. The Salt Lake is adjacent to the green and steep Zhongtiao Mountain in the south, Emei Mingtiao Gang in the north, Sushui Yaotai in the east, and the ancient ferry of the Yellow River in the west. The lake is vast and vast, surrounded by reed wetlands and teeming with waterfowl and migratory birds. Yuncheng Salt Lake was once famous throughout the country for its 4,000-year history of salt production. It was formed in the early Cenozoic period about 500 million years ago and covers an area of ??about 120 square kilometers. Like the world-famous Dead Sea in Israel, it is an inland saltwater lake. The black mud of the Dead Sea in Israel is mainly composed of chlorides, while the black mud of Yuncheng Salt Lake is mainly composed of sulfates. Both are rich in mineral elements that are beneficial to the human body, and both are in the same order of magnitude. It has "different effects on the human body". In addition to the magic of the Dead Sea, Yuncheng Salt Lake is also a place full of life. It is located at the lowest point of the Yuncheng Basin. It is a typical closed-flow inland lake, like a piece of jade? Snail's answer to the posthumous title and punishment:? Zhongqian Street is crisscrossed with thousands of silver islands, vast blue waves, and sparkling lakes. It has been known as the "Silver Lake" since ancient times. Due to the high salt content of the Dead Sea, there is a considerable lack of oxygen, making it impossible for various organisms to survive. However, the Yuncheng Salt Lake is rich in water and grass, with reeds lining the banks, birds singing and flowers fragrant, and full of life. In addition, Yuncheng Salt Lake is rich in "lu salt" with a history of more than 4,000 years, and many cultural landscapes have been derived around the salt lake. The Yanchi Temple built in the Tang Dynasty, the revered Guan Gong Family Temple, the Guandi Temple, the largest martial arts temple in the country, as well as Sima Wen Gong Temple, Yongle Palace Murals, Pujiu Temple, Yellow River Tieniu, and Puzhou Ancient Ferry Ruins and other ruins are dotted around the salt lake like pearls. After enjoying the two wonders of Yuncheng Salt Lake, tourists can also enjoy the beautiful scenery of the Salt Lake, explore the mystery of Chinese salt culture, and improve their cultural literacy during recreation. Yuncheng Salt Lake is located south of Yuncheng in southwest Shanxi Province and at the northern foot of Zhongtiao Mountain. It is the largest lake in Shanxi Province. In ancient times, this place was the place where counties and prefectures were solved, so it was also called Jiechi and "Hedong Salt Pond". Yuncheng Salt Lake has been famous for its salt production since ancient times. The salt produced is called "Jieyan", "Luyan" or "Hedong salt". Yuncheng Salt Lake is an ancient and typical inland saltwater lake. Geological research shows that Yuncheng Salt Lake was born during the Himalayan tectonic movement in the Tertiary period of the Cenozoic, about 50 million years ago. It extends from northeast to southwest and is about 30 kilometers long. It is 3 to 5 kilometers wide, with an altitude of 324.5 meters and a deepest point of about 6 meters, with a total area of ??132 square kilometers. The Salt Lake not only combines the magic of the Dead Sea, but also has incomparable scenery of the Dead Sea. Here there are abundant water plants, dense reeds, birds singing and the fragrance of flowers, and full of vitality. The lake has crisscrossed streets, thousands of silver islands, vast blue waves, and sparkling lake light. The wonders of the silver islands in the lake are the piles of saltpeter that are displayed all year round. From a distance, they look like snow-capped mountains. Dozens of migratory bird species inhabit the dozens of square kilometers of wetlands surrounding the salt lake all year round. When coming to Yuncheng Salt Lake, people can not only enjoy bathing in the black mud of the Dead Sea and floating in salt water, but also enjoy the beautiful scenery of the Salt Lake, explore the mystery of Chinese salt culture, and improve their cultural literacy during recreation. Yuncheng Salt Lake is really a rare tourist attraction integrating culture, fitness, tourism, entertainment and leisure. Salt water floating The water of Yuncheng Salt Lake is rich in salt like the water of the Dead Sea. Testing of the heavy metal content in Yuncheng Salt Lake water shows that the content of heavy metals such as lead, mercury, and cadmium in Yuncheng Salt Lake is lower than that of the Dead Sea, while elements such as sodium, calcium, and magnesium are higher than those of the Dead Sea. Such trace amounts of heavy metals and rich element content, Yuncheng Salt Lake has become a rare salt water floating resort in the world. Experiments show that the density of water in Yuncheng Salt Lake is as high as 1.25 to 1.29 grams per cubic centimeter (about the same density as the Dead Sea water, but slightly denser than the human body), and the buoyancy generated is nearly 30% higher than that of fresh water. Therefore, when a person enters the water, he can float naturally without the water filling his belly, which is convenient for those who like water but cannot swim.

Here, tourists can fully enjoy the fun of salt water floating: tourists can lie on their backs on the water, stretch out their limbs, and float with the waves like leaves. They can form a circle, stretch their legs and wave their arms, and perform various dances in water ballet at will. They can also use their hands to Hug your legs, sit in the water, or even open a flower umbrella, touch the book with your hands, and "read on the waves." According to research, the human body floats in lake water containing high concentrations of minerals. Not only can the body be naturally maintained, but the mind can also be naturally cultivated. Relevant experts believe that 1 hour of floating is equivalent to 4 hours of deep sleep or 4 hours of sleeping. It can make the left and right brains coordinate with each other, keep the mind clear and creative, reduce the tension in the mind and body, and make people refreshed and energetic. abundant. Since the water is rich in minerals, floating and soaking regularly can treat many chronic diseases. For example, when the body is immersed in warm salt lake water, due to the hydrostatic pressure, the blood will be redistributed in the body to achieve a diuretic effect, and joint swelling symptoms such as rheumatoid arthritis will subside; when floating in salt water, the buoyancy in the water will The warming effect can also reduce muscle tension, increase tendon stretch, and improve joint mobility; appropriate soaking can also temporarily increase the concentration of some hormones in the blood, temporarily inhibit immunoglobulins, and reduce the inflammatory response of rheumatoid arthritis. , and reduce the patient's pain. However, due to the high salt content in the salt lake water, the water in the body will be exchanged during the floating process. Therefore, the salt water floating time cannot be too long. After floating, attention should be paid to replenishing water in time. Black mud bathing According to research, the black mud of the Dead Sea is mainly composed of chlorides, while the black mud of Yuncheng Salt Lake is mainly composed of sulfates. Both are rich in mineral elements that are beneficial to the human body. Mineral elements are indispensable components of human body tissues and necessary substances to maintain normal human physiological functions. Mineral elements also promote functional behaviors in the skin, such as the production of oil and moisture. When the skin relaxes due to age, minerals can help bring blood and oil to the surface of the skin to produce a protective effect; minerals are hydrophilic and can promote the skin to maintain moisture; it can keep the film, mucus moist and increase Cell regeneration keeps the skin more elastic. In addition, minerals absorbed through the skin can also increase the strength of blood vessel contraction and enhance the body's immune system. According to research, there are more than 60 mineral elements that a person takes in from various foods and retains them in the body throughout his life, accounting for about 4% of the human body. According to foreign experience, bathing in the black mud at the bottom of the salt lake, which is rich in minerals, has obvious beauty and skin treatment effects. Now, Yuncheng Salt Lake has also developed a black mud bathing project. The local business community has also introduced advanced technology and equipment and developed a series of cosmetics such as black mud bath soap, shampoo, shower gel, and body mask. Visitors to the Yuncheng Salt Lake Bathing Beach can fully enjoy the black mud bath. Apply the salt lake black mud evenly to parts of the body except the eyes, lips, etc., so that the rich minerals in the black mud can penetrate into the wrinkles and pores of the skin. , which can not only clean the skin, reduce inflammation, remove wrinkles, sterilize, quickly heal small wounds, remove excess oil and cuticles from the skin, repair uneven epidermis, shrink large pores, promote skin metabolism, but also lose weight. The beauty and health-care effects of black mud bathing have been favored by more and more tourists. Lu salt culture Since ancient times, Yuncheng Salt Lake has been famous for its rich production of "lu salt". According to research, the development history of "Lu Yan" can be traced back to more than 4,000 years ago. In ancient times, Emperor Shun couldn't help singing the "Song of the Southern Wind" while he was inspecting the Salt Lake in Yuncheng: "The fragrance of the south wind can relieve our people's anger; the time of the south wind can relieve our people's wealth." This is a high-level summary. The unique social and economic value of Yuncheng Salt Lake. To a certain extent, the development of "Lu salt" has made a major contribution to the Chinese nation ending the era of eating hair and drinking blood and nurturing Chinese civilization. "Lu salt" has developed from being exposed to sunlight in the early stages of development to being made from natural jade, to being harvested by collective labor. After nearly 3,000 years of development, by the Tang Dynasty, a complete salt shoveling method of "reclamation, watering and sun-drying" had been formed. This is Yuncheng An epoch-making symbol for the production of "Lu Salt" in Yanchi. The Tang Dynasty's method of reclaiming borders and watering them in the sun was nearly 1,000 years earlier than Europe's daily practice of making salt in the fields, which reflects that my country's productivity development level in the Tang Dynasty was in the world's leading position. In the 1980s, based on full research on Yuncheng Salt Lake resources, relevant departments began to focus on the development and utilization of the sodium sulfate series. The production of "lu salt" basically stopped. However, as an advanced production technology that has been used for thousands of years, The salt shoveling method of "cultivating the border and pouring it in the sun" is still widely used in the production process of sea salt.

Yuncheng Salt Lake is located in the hinterland of the Shannan Basin, at the bend of the Qin, Jin and Henan Yellow River. It is embraced by Zhongtiao Mountain and surrounded by the Yellow River. It not only has unique scenery, but also has a long cultural heritage and rich cultural landscape. Yuncheng is the hometown of Guan Yu, and the Guandi Temple, the largest martial arts temple in China, is located here. In addition, there are Sima Wengong Temple, Yongle Palace Murals, Pujiu Temple, Yellow River Tieniu, Puzhou Ancient Ferry Ruins, etc. dotted around the Salt Lake like pearls. Yuncheng Salt Lake complements the surrounding historic sites and the scenery of the Yellow River. Yuncheng Salt Lake is rich in tourism resources and has great development potential. It is believed that a world-class salt water floating and black mud bathing center and "Luyan" cultural tourism center will be built here in the near future. The Jiuqu Yellow River gave birth to Chinese civilization; Yuncheng Salt Lake gave birth to Chinese salt culture. In October 2003, in order to effectively protect Yuncheng Salt Lake, China's "Dead Sea" resource, Nanfeng Group applied for the "Dead Sea", "China Dead Sea", "Huaxia" "Dead Sea", "Far East Dead Sea", "Sanjin Dead Sea" and other trademarks; in March 2004, Nanfeng Chemical Group Co., Ltd. passed the strict review procedures of acceptance, preliminary examination, reexamination, and announcement by the Trademark Office of the Industrial and Commercial Administration Department of the State Council. Officially obtained the approval registration certificates for the service trademarks of "Dead Sea", "Far East Dead Sea", "Sanjin Dead Sea", "Chinese Dead Sea" and "China Dead Sea". How was the Yuncheng Salt Lake formed?

The salt lake was the sea in ancient times. my country's famous Qaidam Basin Salt Lake was a vast sea 230 million years ago. Later, as the earth's crust rose and the seawater withdrew, an inland basin with no edges appeared and developed into a salt lake.

Some salt lakes evolved from freshwater lakes. The uplift height of the sandbar on the edge of the lake basin varies in different periods. When the sandbar is lower than the sea level, the lake basin is in a semi-closed flow state, and seawater flows in; when the sandbar exceeds the sea level, the lake basin is in a closed-flow state. The climate has been dry and hot for a long time, and the lake water has evaporated strongly, concentrated and turned into brine, and salts have gradually been deposited.

The formation of salt lakes requires certain natural conditions, the most important of which are the following two points:

(1) Arid or semi-arid climate. Under arid or semi-arid climate conditions, the evaporation of lakes often exceeds the lake's recharge. The lake water continues to concentrate and the salt content increases day by day, causing various elements in the water to reach a saturated or supersaturated state, forming formations on the lakeside and bottom. Sedimentary deposits of various salts. For example, the Qaidam Basin with an altitude of 2,600 to 3,200 meters is located deep inland and is surrounded by rolling mountains. Under the influence of mid-latitude westerly circulation all year round, the transport of water vapor and precipitation are very scarce, and the air It is dry and is a typical inland desert basin. The Chaka Salt Lake located on the northeastern edge of the basin has an annual precipitation of about 210 mm, while the Chaerhan Salt Lake in the center of the basin has an annual precipitation of only about 30 mm. The evaporation here is much greater than the precipitation. Such climatic conditions are obviously very beneficial to the formation of salt lakes, so many salt lakes are distributed inside the basin. If the climate is extremely dry, with no rain all year round, or with little precipitation, it is also not conducive to the formation of salt lakes. For example, in the Taklimakan Desert and Gurbantunggut Desert in Xinjiang, there are continuous sand dunes, no runoff on the surface, and salts are dispersed. It is difficult to form salt lakes in these areas.

(2) Closed terrain and a certain supply of salt and water. The closed terrain allows the runoff in the basin to converge into the lake, preventing lake water from leaking out, and salt is continuously transported from the basin to the lake through runoff. Under the strong evaporation, the lake water becomes saltier and saltier, and more and more salt accumulates. Over time, a salt lake is formed.

In the Salt Lake area, you can often see circles of silver-white salt ribbons surrounding the lake, like beautiful necklaces worn on the salt lake. This natural phenomenon is a strong evidence of the migration of salt materials from the river basin to the salt lake. Because during the migration of various salts dissolved in the water from the river basin to the salt lake, the water gradually evaporates and the concentration continues to increase. Once it reaches a saturated or supersaturated state, precipitation will occur. However, due to the different solubility of various salts, they show a certain precipitation sequence. From the upstream of the material source to the salt lake, various salt sediments have an obvious ring-like distribution pattern. For example, in some salt lake areas at the northern foot of the Kunlun Mountains, the area near the mountain is a boron salt zone, and the area near the lake is a Glauber's salt zone. Salt and carnallite are deposited in the lake.

Salt lakes can not only be formed on continents, but can also evolve from bays. In the vast ocean, the average salt content per liter of water is 35 grams.

If the bay is isolated from the ocean due to the gradual development and expansion of coastal sand bars and becomes closed, and the climate is dry and hot, the salinity of the water body will continue to increase due to strong evaporation, and eventually a salt lake will be formed, producing various salts. Class sedimentation. This kind of salt lake evolved from a bay is called a sea salt lake. The salt lakes in modern China are all continental salt lakes. What caused the formation of Poyang Lake?

According to the research of Mr. Zhu Kezhen, a meteorologist, geographer, and educator, China’s climate became warmer from the Sui, Tang, and Five Dynasties to the Northern Song Dynasty. At this time, the lakes in the middle and lower reaches of the Yangtze River had significant development and expansion. The Poyang Lake area located between the middle and lower reaches of the Yangtze River expanded rapidly after the Sui and Tang Dynasties. During the Sui, Tang and Northern Song dynasties, which were hot and rainy, the runoff of the Yangtze River increased accordingly, especially during the flood season. However, Yunmeng Ze in the Jianghan Plain, which could fully regulate floods, had basically disappeared during the Sui and Tang Dynasties. Pengli Ancient Ze in the north of the Yangtze River had long been replaced by thunder ponds the size of Pichi. As a result, the flood storage capacity of the Yangtze River Basin had significantly declined. The runoff of the main stream of the Yangtze River increased sharply, and the water level rose. Except for part of the flood diversion tunnel, most of it poured eastward. It has two consequences in the Hukou area: one is to divert the flood water and pour it back into Pengli Ze; the other is to support the water out of Pengli Ze. The combination of these two results is also an important factor in Peng Lize's expansion. Therefore, from the late Tang Dynasty and the Five Dynasties to the early Northern Song Dynasty, Penglize expanded beyond Yingzikou to the Xiaoyang Plain in the southeast at an unprecedented speed, basically establishing the scope and shape of today's Poyang Lake. What caused the formation of Qinghai Lake?

1. Qinghai Lake is a structurally faulted lake, and the edge of the lake basin is mostly connected to the surrounding mountains by faults. It was the early stage of lake formation 200,000 to 2 million years ago.

2. Due to the blockage of the leakage channel, Qinghai Lake evolved into a closed lake. Coupled with the drying of the climate, Qinghai Lake has gradually transformed from a freshwater lake into a saltwater lake.

Qinghai Lake

1. Qinghai Lake, also known as "Cowenbu", which means "blue sea" in Tibetan, is located in the northwest of Qinghai Province The Qinghai Lake Basin in the center is both the largest inland lake and the largest saltwater lake in China. It was formed by the collapse of faults between Datong Mountain, Riyue Mountain in Qilian Mountains and Nanshan Mountain in Qinghai.

2. Qinghai Lake is located on a plateau, and the average daily temperature in July and August is only about 15 degrees. This is the most beautiful time of Qinghai Lake, with thousands of acres of rapeseed flowers blooming around the lake, and vast expanse of blue waves. The bright blue is dotted with golden yellow, and the wildflowers in the alpine pastures are as colorful as silk, and countless fat and strong cattle and sheep are dotted among them.

3. On July 30, 2012, the latest remote sensing monitoring results from the Qinghai Provincial Institute of Meteorological Science showed that the area of ??Qinghai Lake has continued to increase for 8 years. Yuncheng Salt Lake is rich in salt? Let’s talk about the introduction of Salt Lake

Yuncheng Salt Lake is located south of Yuncheng in southwest Shanxi Province and at the northern foot of Zhongtiao Mountain. It is the largest lake in Shanxi Province. In ancient times, this place was the place where counties and prefectures were solved, so it was also called Jiechi and "Hedong Salt Pond". Yuncheng Salt Lake has been famous for its salt production since ancient times. The salt produced is called "Jieyan", "Luyan" or "Hedong salt". Yuncheng Salt Lake is an ancient and typical inland saltwater lake. Geological research shows that Yuncheng Salt Lake was born during the Himalayan tectonic movement in the Tertiary period of the Cenozoic, about 50 million years ago. It extends from northeast to southwest and is about 30 kilometers long. It is 3 to 5 kilometers wide, with an altitude of 324.5 meters and a deepest point of about 6 meters, with a total area of ??132 square kilometers.

Yuncheng Salt Lake is comparable to the world-famous Dead Sea in Israel. The black mud in the lake contains seven major and sixteen trace elements. You can go boating in the lake, and the black mud in the lake can beautify your skin and rejuvenate your skin. Therefore, Yuncheng Salt Lake is known as the Dead Sea of ??China.

Yuncheng Salt Lake is the third largest sodium sulfate inland lake in the world, covering an area of ??132 square kilometers and has a development history of more than 4,000 years. The Salt Lake is adjacent to the green and steep Zhongtiao Mountain in the south, Emei Mingtiao Gang in the north, Sushui Yaotai in the east, and the ancient ferry of the Yellow River in the west. The lake is vast and vast, surrounded by reed wetlands and teeming with waterfowl and migratory birds.

Yuncheng Salt Lake is rich in "lu salt" and has a history of more than 4,000 years. Many cultural landscapes have been derived around the salt lake. The Yanchi Temple built in the Tang Dynasty, the revered Guan Gong Family Temple, the Guandi Temple, the largest martial arts temple in the country, as well as Sima Wen Gong Temple, Yongle Palace Murals, Pujiu Temple, Yellow River Tieniu, and Puzhou Ancient Ferry Ruins and other ruins are dotted around the salt lake like pearls.

Since ancient times, Yuncheng Salt Lake has been famous for its rich production of "lu salt".

According to research, the development history of "Luyan" can be traced back to more than 4,000 years ago. In ancient times, Emperor Shun couldn't help singing the "Song of the Southern Wind" while he was inspecting the Salt Lake in Yuncheng: "The fragrance of the south wind can relieve our people's anger; the time of the south wind can relieve our people's wealth." This is a high-level summary. The unique social and economic value of Yuncheng Salt Lake. To a certain extent, the development of "Lu salt" has made a major contribution to the Chinese nation ending the era of eating hair and drinking blood and nurturing Chinese civilization. "Lu salt" has developed from being exposed to sunlight in the early stages of development to being made from natural jade, to being harvested by collective labor. After nearly 3,000 years of development, by the Tang Dynasty, a complete salt shoveling method of "reclamation, watering and sun-drying" had been formed. This is Yuncheng An epoch-making symbol for the production of "Lu Salt" in Yanchi. The Tang Dynasty's method of reclaiming borders and watering them in the sun was nearly 1,000 years earlier than Europe's daily practice of making salt in the fields, which reflects that my country's productivity development level in the Tang Dynasty was in the world's leading position. In the 1980s, based on full research on Yuncheng Salt Lake resources, relevant departments began to focus on the development and utilization of sodium sulfate salt series. The production of "lu salt" basically stopped. However, as an advanced production technology that has been used for thousands of years, The salt shoveling method of "cultivating the border and pouring it in the sun" is still widely used in the production process of sea salt. Yuncheng Salt Lake is located in the hinterland of the Shannan Basin, at the bend of the Qin, Jin and Henan Yellow River. It is embraced by Zhongtiao Mountain and surrounded by the Yellow River. It not only has unique scenery, but also has a long cultural heritage and rich cultural landscape. Yuncheng is the hometown of Guan Yu, and the Guandi Temple, the largest martial arts temple in China, is located here. In addition, there are Sima Wengong Temple, Yongle Palace Murals, Pujiu Temple, Yellow River Tieniu, Puzhou Ancient Ferry Ruins, etc. dotted around the Salt Lake like pearls. Yuncheng Salt Lake complements the surrounding historic sites and the scenery of the Yellow River. Yuncheng Salt Lake is rich in tourism resources and has great development potential. It is believed that a world-class salt water floating and black mud bathing center and "Luyan" cultural tourism center will be built here in the near future. Yuncheng Salt Lake

[China Dead Sea] China Dead Sea Text:

During the summer vacation, I visited many places, such as Jiulong Valley, Lianghekou, Pingle Ancient Town and other interesting places. , but what makes me most unforgettable is the Dead Sea in Daying County, the Dead Sea in China.

I saw in the newspaper a long time ago that the Dead Sea in China is very fun, and you can even lie down and float on the water! So I look forward to visiting the Dead Sea in China one day. Unexpectedly, I was very lucky. During this summer vacation, I went to the Dead Sea in China with my parents. The Dead Sea in China is divided into two venues: an indoor activity room and an outdoor floating field. We first bought three air mattresses to use as pillows to float and rest on the outdoor floating field. Not to mention that it feels so good to float on the water! The sun shining on my body is extremely comfortable, a thousand times more comfortable than sleeping on a soft bed! It is said that soaking here for twenty minutes or more can also cure colds and some skin diseases such as small acne on the face!

After playing with floating on the water, we came to the indoor activity room. I didn’t know how big it was without going in. As soon as I entered, I was shocked, “It’s so big!” I couldn’t help but yell. With a roar, it can be compared with the size of a football field. The sixth grade primary school composition "China's Dead Sea". Once inside, I went straight to the "high-altitude rapid slide", which was so much fun! I slid down the water quickly, as fast as the wind, and rushed straight down like an arrow off the string. At that time, I thought to myself: What if this slide suddenly breaks down? Anyway, I was a little scared. After playing on the slide, I went to the indoor light salt lake. At this time, waves of "tsunamis" rushed over like ferocious beasts, causing me to choke on a few mouthfuls of water, but it was very ***! Then, I also went to the "Children's Paradise" and "Rapid Rapids". In the afternoon, due to time constraints, we had to reluctantly leave the Dead Sea in China.

The Dead Sea is a heart-stirring sea, a place where people don’t want to go home. I will definitely remember you - the Dead Sea of ??China.

What are the reasons for the formation of cities? High-quality answers The factors affecting the formation of cities mainly include: socioeconomic conditions, natural conditions

Social conditions:

1. The impact of social development on the formation of cities

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2. The influence of political factors on the formation of cities. Some political events have a great impact on the formation and development of certain cities, and even have a decisive impact on some cities.

3. Traffic conditions have a great impact on the formation and development of certain cities. Impact of urban formation Transportation is an important means of regional connection and material exchange. Important cities are transportation hubs, and transportation networks connect them with the hinterland.

4. The impact of cultural factors on urban formation Human beings Cultural activities can often promote the formation and development of cities.

Natural conditions:

1. Geological conditions and the formation of cities Geological conditions are the solid foundation for urban construction and development. Rocks are everywhere inconvenient for city construction. The sand, gravel, and clay layers formed by rock weathering are convenient for human activities and urban development.

2. Terrain and the formation of cities. From the topographic point of view, plains are the most It is suitable for the formation and development of cities. The flat terrain facilitates urban expansion, the development of various transportations, and the development of agriculture. Therefore, important cities in the world are mostly distributed in plain areas. Such as Shanghai, Beijing, Guangzhou, Hankou, etc. in our country. The world Large cities in the world, such as New York, London, Berlin, Paris, Tokyo, Chicago, Moscow, Calcutta, etc., are also located in plain areas.

3. Climate and urban formation From a global perspective, most cities In particular, large cities are mostly located in temperate areas suitable for human life. Climatic conditions often affect the nature of cities. Osaka in Japan and Lancaster in the United Kingdom became the world's early famous textile industry cities, which are closely related to local climate conditions (warmth, raininess, air humidity). etc.) have a certain relationship.

4. Water and urban formation. Urban formation and development have a deep relationship with water. Riverside, lakeside and coastal areas are all areas that are conducive to urban formation. Rivers have always been important. It is also the best source of industrial water and drinking water, providing important favorable conditions for the formation and development of cities.

5. After the industrial revolution in minerals and cities, some large Mineral producing areas rapidly developed into newly built industrial cities.

The formation of early cities was basically dominated by natural conditions

Supplement: Atmospheric reverse radiation is enhanced, so that the temperature of the ground will not Dropped too much. The answer is A