What kind of plain is it that belongs to the trench plain

Guanzhong Plain, the geographical feature of our Shaanxi Province, the central plain of Shaanxi Province. It is also known as the Weihe Plain and the Guanzhong Basin. It starts from Baoji in the west, reaches Tongguan in the east, borders the Qinling Mountains in the south, and connects the north mountain of Weihe River in the north.

It is narrow in the west and wide in the east, about 300 kilometers long from east to west, about 400 meters above sea level, high in the west and low in the east, and drops to 340 meters in the riverbed of the Yellow River. It is formed by faulting and subsidence, and is commonly known as the Weihe River graben, and is alluvial into a plain through the Weihe, Jinghe and Luohe rivers. The terrain is flat, the soil is fertile, the climate is warm, and the irrigated agriculture has been famous since ancient times, known as the Eight Hundred Miles of Qinchuan.

It is rich in wheat and cotton. There are large and medium-sized cities such as Xi'an, Xianyang, and Baoji. In history, there were many ** in Guanzhong, and in 1556, Huaxian ** reached the 8th level of Rui's.

The two sides are bounded by high-angle faults, and the trough-shaped fault block structure descends in the middle. Mostly refers to large and medium-sized structures, and the largest ones can extend up to hundreds of kilometers. Grabens are often long strip-shaped faulted basins with boundaries that can be straight, but more commonly polygonal boundaries are polygonal boundaries that are generally formed by the union of multiple high-angle normal faults.

A fault that is limited by a fault on only one side is called a semi-graben or a kei structure. Another type of structure that corresponds to grabens is the ramparts. A barrier is a fault-block structure that is surrounded by faults on both sides and rises in the middle.

Its boundary faults are generally also high-angle normal faults. Grabens and barriers are often associated with each other and are arranged alternately to form basin ridge structures, such as the basin ridge area in the western United States. Grabens are mostly developed in areas where the earth's crust is stretched.

Under the action of horizontal tension, the crust thins vertically, and two sets of high-angle normal faults conjugated in the upper part are formed, and the land block in the middle descends to form a graben. A barrier is formed between two faults that tend to be opposite. Grabens are often closely related to sedimentary minerals, especially coal and oil and gas reservoirs.

Famous grabens include the Rhine graben in Europe, the Fenwei graben in Shanxi and Shanxi in China, etc. The grabens are often characterized by faulted valleys in the topography, such as the Fenwei grabens, which form the Fenhe River valley and the Weihe River plain (valley). The Weihe Plain is also known as the Guanzhong Plain.

In the central part of Shaanxi Province. It is between the Qinling Mountains and the North Mountains of Weibei (Laolong Mountain, Sagashan, Yaowang Mountain, Yaoshan Mountain, etc.). From Baoji in the west, Tongguan in the east, Qinling in the south, and the northern Shaanxi Plateau in the north.

It is about 325,800 meters above sea level and about 300 kilometers long. The width of the north and south is different, the widest in the east is 100 kilometers, about 75 kilometers near Xi'an, only 20 kilometers in Meixian County, and gradually closes into a canyon to Baoji, which resembles a "crescent moon". It covers an area of about 10,000 square kilometers.

Because it is between Hangu Pass and Dasan Pass (one says that it is between Hangu Pass, Dasan Pass, Wuguan and Xiao Pass), it was called "Guanzhong" in ancient times. During the Spring and Autumn Period and the Warring States Period, it was the hometown of the Qin State and was known as the "Eight Hundred Miles of Qinchuan". The Weihe Plain is a fault subsidence area, that is, a graben, which is formed by the alluvium of the Weihe River and its tributaries, the Jing River and the Luohe River.

Introduction to Guanzhong Plain: Also known as the Weihe Plain or Weihe Basin. It is a graben-type tectonic plain.

It is located in the central part of Shaanxi Province, from Baoji in the west to Tongguan in the east

Introduction to Guanzhong Plain: Also known as the Weihe Plain or Weihe Basin. It is a graben-type tectonic plain.

The alluvial plains of China are: on the first topographic step of the Qinghai-Tibet Plateau, there is the beaded wide valley alluvial plain of the Maquan River in the upper reaches of the Yarlung Zangbo River; Located on the plateau of the second topographic step, there are the alluvial plain of the Hetao in the middle reaches of the Yellow River and the alluvial plain of the Weihe River in Guanzhong; The plains of the middle and lower reaches of the rivers on the lowest topographic steps in the east include the North China Plain, the Northeast Plain, the Huang-Huai-Hai Plain, the Middle and Lower Yangtze River Plains, and the Pearl River Delta Plain.

Alluvialplain is a plain landform formed by the sedimentation of rivers. In the lower reaches of the river, the flow is not as rapid as the upstream, and a large amount of sediment is eroded from the upstream to the downstream because the flow is no longer fast enough to carry the sediment, and the sediment is deposited downstream. Especially when the river is flooded, sediment is deposited on both sides of the river, and alluvial plains are gradually formed.

Famous alluvial plains include the Amazon Plain, the middle and lower reaches of the Yangtze River Plain, the Huang-Huai-Hai Plain, the Ningxia Plain, etc.

Four major plateaus: Qinghai-Tibet Plateau, Inner Mongolia Plateau, Loess Plateau, Yunnan-Guizhou Plateau.

Four major basins: Tarim Basin, Junggar Basin, Qaidam Basin, and Sichuan Basin.

Three major plains: the Northeast Plain, the North China Plain, and the middle and lower reaches of the Yangtze River Plain.

The three major hills, Liaodong hills, Shandong hills, and southeast hills.

The topographical characteristics of the plains: the altitude is generally between 0 and 50 meters, the ground is flat or undulating, mainly distributed on the banks of large rivers and areas near the ocean. Plains are places where the population is concentrated.

A plain is a large area with flat or less undulating ground, mainly found on the banks of large rivers and near the sea.

There are two main types of plains: the free-standing plain, which is one of the world's five basic terrain terrains, such as the lower Yangtze River plain. Subordinate plains are the constituent units of a larger terrain, and the plateau can include basins (the Qinghai-Tibet Plateau includes the Qaidam Basin), and basins often have plains and hills of different sizes, such as the Guanzhong Plain, the Chengdu Plain (in the Sichuan Basin) and several plains in the middle reaches of the Yangtze River.

The relationship between basins and plains: some basins include plains, hills and river valleys, such as the Songliao Basin and other basins in several basins to form the Northeast Plain, and the Two Lakes Basin includes the Two Lakes Plain. For example, the North China Plain has part of the Bohai-North China Basin, and the Siberian Plain is the Siberian Basin.

What are the causes of the formation of plains, plateaus, basins, mountains, hills?

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What are the reasons for the formation of plains, plateaus, basins, mountains, and hills: The reasons for the formation of plains, plateaus, basins, mountains, and hills are: the internal forces of the earth make the terrain high and uneven - plateaus, basins, mountains, hills; Through the processes of weathering, erosion, transport, and sedimentation, external forces tend to flatten the terrain - plains and hills.

Plain. The sea swims in the open and flat ground with low altitude, sometimes slightly undulating. There are various types and levels of the plains due to their composition, terrestrial abrasion, and premature dynamic action.

The accumulation formed by accumulation is called the accumulation plain; The denudation formed by denudation is called the denudation plain. Accumulation plains can be divided into: alluvial plain, alluvial plain, alluvial-flood plain, aeolian plain, moraine plain, permafrost plain, alluvial-sedimentary plain, etc.

The denudation plain can be divided into: dissolution plain, ice erosion plain, wind erosion plain, etc. The most widespread of the accumulation plains is the alluvial plain.

The denudation plain is the result of denudation-leveling under various external forces. The area of the denudation plain is generally relatively small, and there are certain regional distribution characteristics, such as the karst plain in the limestone area.

The terrain types are as follows:

1. A large area with flat or small undulations on the plain, generally below 200 meters above sea level, is divided into independent plains and subordinate plains. 2. The plateau is more than 1000 meters, with little undulation, steep edge and vast area. 3. The terrain of hills with an altitude of more than 200 meters and less than 500 meters is composed of continuous low hills, with a gentle slope and a relative height of no more than 200 meters.

4. The mountain area is more than 500 meters, the slope is steep, the valley is deep, the form is peculiar and diverse, and it is continuous. 5. The middle of the basin is low and the surrounding is high, generally the middle refers to the hills or plains, and the surrounding refers to the plateau or mountain range Basins are mainly divided into two types, one is the tectonic basin formed by the tectonic movement of the earth's crust, and the other is the erosion basin formed by the erosion of glacial flowing water.

The elevation of the plain is below 200 meters, and the contour line is sparse The altitude of the plateau is generally greater than 1000 meters, the middle is high, and the surrounding is low, and the middle terrain is relatively gentle The mountain elevation is greater than 500 meters, and the contour line is dense The elevation of the hills is 200 500 meters, and the terrain is undulating The basin is low in the middle and high on all sides.

In addition to mountains, hills, plateaus, and basins, common terrains include plains, swamps, meadows, etc.

In addition to the 3d ghost plains, the plateau basin, and those people, this and the plains, our side, there are many plains in the south.