Tongguan County, belonging to Weinan City, Shaanxi Province, is located at the eastern end of Guanzhong Plain in Shaanxi Province, adjacent to lingbao city in Henan Province in the east, huayin city in the west, Luonan County in the south, and Dali County and Ruicheng County in Shanxi Province across the Yellow River in the northwest, between1109' 32 "and1/kloc-0. The total area is 526 square kilometers. By the end of 2022, Tongguan County had 1 streets and 4 towns under its jurisdiction. By the end of 2022, the permanent population of Tongguan County was123,400.
Tongguan has a long history. The Shang Dynasty was called Taolin, and the Zhou Dynasty was called Ling Wei. It was called Taolinsai in the Spring and Autumn Period. In the fifth year of the Western Han Dynasty (202 BC), Tongguan began to set up a ship port yamen, which was later renamed Sichuan Sikong County. Tongguan County was merged into Huayin and other counties twice from the end of the Eastern Han Dynasty to the beginning of the Qing Dynasty, which lasted 1500 years.
geographical environment
The Qinling Mountains in the south of Tongguan County belong to the Archean Taihua Group, which is an east-west banded uplift formed after the Lvliang Movement. Crustal tectonic movement occurred in Proterozoic Sinian, and the strata were squeezed and folded into mountains. During the Himalayan movement, the southern margin broke and uplifted southward, forming a horse-seeking graben. In Cenozoic, under the control of Qinling zonal tectonic system and Qi, Lu and He tectonic systems, two sets of tectonic movement systems were squeezed, twisted and fractured, forming Wei Fen.
In addition, the secondary piedmont fault depression (Huayin-Tongguan fault) was formed under the influence of one-side uplift, and the Tongguan Mountain was strongly broken and uplifted by the compression of the north and south graben, thus the Qinling Mountains in China appeared. Since Quaternary, the northern part of the piedmont fault has become a loess platform. Huang Wei Valley was formed after long-term flood erosion in northern Taiyuan.
Reference to the above content: Baidu Encyclopedia-Tongguan County