Mianyang, known as Mianzhou in ancient times, is a prefecture-level city, a second-class big city and a provincial sub-central city under the jurisdiction of Sichuan Province. Located in the northwest of Sichuan Basin, the middle and upper reaches of Fujiang River. According to the division of cities in China by authoritative organizations, Mianyang is a third-tier city, ranking 76th. It is the only third-tier city in Sichuan Province, worthy of the name.

Mianyang has a history of more than 2,200 years, and has always been governed by states and counties. Later, because the city site is located in Mian Shan Zhinan, it was named "Mianyang". Stone tools and pottery from the Neolithic Age 4,500 years ago were unearthed at the Biandui Mountain site in China. It is the birthplace of the poet Li Bai and Ouyang Xiu, one of the "Eight Masters of Tang and Song Dynasties", the hometown of Leizu, the mother of Yellow Emperor silk, and the birthplace of Dayu, the founder of Xia Dynasty. Known as "the land of prosperity, the Silicon Valley of the West".

Geological structure of Mianyang city

Mianyang city has developed strata, complex rock structure and great changes in lithology and lithofacies. Multi-stage and multi-structure inheritance and interference superposition, and the structural form is extremely complicated; Late magmatism and regional metamorphism are weak; Sedimentary mineralization is strong and endogenous mineralization is weak. It is bounded by Jiangyou fault and spans two first-class structural units.

According to the plate theory, it is located in the meridional mosaic zone of the east and west plates of the country; According to the theory of trough platform, it also obliquely spans Ganzi-Songpan geosyncline and Yangtze platform. This regional geological pattern controls the spatial distribution and combination characteristics of natural conditions and resources such as lithofacies, strata, minerals, topography, landform, soil, climate, water system and biology in Mianyang City, and has a far-reaching impact on human social and economic activities.

Reference to the above content: Baidu Encyclopedia-Mianyang City