Collect
Check out my collection
0
Useful +1
The Yanshan Movement (also known as the Old Alpine Stage) is
Jurassic Period
to
The Cretaceous Period
The widespread crustal movement occurred in China during the period.
The Yanshan Mountains near Beijing are a typical example of the many regions in China where the Earth's crust has been squeezed and folded up. Geologists place an intense presence at this time
Crustal movement
The total is called Yanshan Movement.
[1]
- Chinese name
- Yanshan movement
- Foreign name
- Yanshan movement
- connotative
- Widespread crustal movement in China
- Time period
- Jurassic and Cretaceous period
- from
- It is named after Yanshan Mountain near Beijing as the standard area
- article
- The Yanliao biota replaced the Jehol biota
catalogue
Yanshan movement
The Yanshan Movement is named after the Yanshan Mountain near Beijing as the standard area. Since then, Chinese geologists have continued to study the Yanshan movement and put forward different stages. The Yanshan Movement is of great significance to the development of Chinese geotectonics and the laying of geomorphic contours
Upper reaches of Yangtze River
formed
Tanggula Mountains
, also make
Yangtse River
It's starting to take shape. At this time, China's land area expanded again,
Ancient Mediterranean
Keep moving back. Due to the different tectonic background, there are obvious differences in the intensity and manifestation of Yanshan movement in the east and west. in
The Greater Khingan Mountains
,
Taihang Mountains
,
Xuefeng Mountain
To the west of the line, some large ones are relatively stable
Inland basin
Where, as
Ordos basin
,
Sichuan basin
,
Junggar Basin
,
Tarim basin
And other basins, which almost continuously received rivers,
Lake facies deposit
; Basement folds are common in the consolidated Paleozoic geosynclinal belt outside the basin. To the east of the above line, tectonic activity is more intense, resulting in many NORtheastward or Northeastward parallel inclined fold fault mountains and a large number of small
Faulted basin
And accompanied by magmatic activity, especially along the southeast coast
granite
The intrusions and volcanic eruptions were particularly intense, indicating increased tectonic activity along the Pacific coast.
After the Yanshan Movement, the tectonic pattern of Chinese landform has clearly emerged.
For more than 100 million years, the crustal movement has been particularly strong in China. Two periods were most notable.
The first period began 130 million to 40 million years ago and ended about 70 million years ago. The general outline of the topography of today's China was initially laid down in the Yanshan Movement. Another period is nearly 30 million years, China has become a strong crustal movement on the earth, tall
Himalayas
Rise from the sea; Not only the Himalayas, but also many places in China have shown increased crustal activity, especially in the western region, the phenomenon of uplift is very significant, and many mountains that have been formed in the Yanshan Movement have been lifted up again, and this change has not completely stopped to this day. There was a major shift in the East Asian tectonic system,
Siberian plate
Towards the south,
Pacific plate
Towards the west,
Indian Ocean plate
The "East Asian convergence" tectonic system, characterized by intracontinental subduction and intracontinental multidirectional orogeny, was formed by the convergence of the northeastward and mid-Korean plates.
在这一过程中，晚侏罗世大陆汇聚导致岩石圈急剧增厚，随之引发早白垩世岩石圈垮塌和大规模岩浆火山作用，中侏罗世燕辽生物群向早白垩世热河生物群发生更替，成为中国大陆和东亚重大构造变革事件，这是燕山运动的基本内涵。
[1]
