The North China Plate has risen to land as a whole since the Middle Ordovician, missing the Upper Ordovician (in many areas it is still missing the Middle Ordovician), The Silurian, Devonian, and Lower Carboniferous.
It was not until the late Carboniferous plate that it fell again and suffered from sea intrusion.
Paleozoic hypoplasia and parallel non-integrated contact between Upper Carboniferous and Ordovician.
The Carboniferous-Permian is represented by the Taiyuan section of Shanxi Province, and is characterized by coastal facies, sea-land interaction facies, and continental sediments.
In addition to the thick accumulation of coal-bearing clastic debris in the northern foothills of the Dabie Mountains in the early Carboniferous Period, and the possibility that sedimentation may be accepted in the Eastern Liaoning region, the main part of the plate was still a nearly quasi-plain lowland.
The Benxi Formation of the Upper Carboniferous Is a clastic rock containing aluminum (bauxite) and iron (Shanxi-style iron ore) on the paleowinding shell, with thin layers of limestone and coal seams, representing the coastal environment at the beginning of the invasion.
The Benxi Formation is about 50 meters thick in the north of Shanxi, thinned in the south, and even missing in the Yuhuai area. In the Benxi area of Liaodong Province, the strata are fully developed, of which there are many marine sandwiches, and the thickness can reach about 300m.
It can be seen that the terrain of the plate is low in the north and high in the south.
The Upper Carboniferous Taiyuan Formation is a coal-bearing sediment of the sea-land interaction, with a thickness of about 95 m.
In the late Carboniferous Period, the paleogeographic features have undergone great changes, and the area from Benxi in Liaoning to Dongsheng in northern Shaanxi is a continental sediment.
In the Daqingshan area of Inner Mongolia, an inland fault basin was formed.
From Taiyuan to the south, the marine mezzanine gradually increased, the thickness gradually increased, in Huainan, Henan and Ordos and other places can be seen that the Taiyuan formation is directly overlaid on the Ordovician limestone, the bottom can also be seen the existence of bauxite shale, the maximum thickness of up to about 350m, of which the marine limestone sandwich is more;
The topography of the North China Plate during the Late Carboniferous period was characterized by high north and low south.
The Lower Permian Shanxi Formation is a sediment deposition of peat swamps in the delta plain under the background of sea retreat, indicating that the north China Plate of the Early Permian is generally low and flat, which is an important coal-forming period.
The Upper Permian Stone Box Formation is a river and lake facies deposition, mainly variegated-purple-red clastic deposition, and the Shiqianfeng Formation has belonged to a red strata, which is an inland river and lake sediment under the climate drought.
Differential movement within the Late Permian plate intensified, gradually revealing the contours of sedimentary basins separating each other. The eastern part of the plate is a small inland basin isolated from each other, while the western Ordos region is a large inland basin with a perm thickness of up to 2000 m in the central part of the basin.
When the North China Plate entered the Mesozoic Triassic Period, it was still dominated by continental sedimentation, and the east-west difference within the plate was more obvious.
The western Ordos region is still a large inland basin, the Triassic is well developed, and its formation construction characteristics are: lower and middle purple red sand mudstone; upper gray-green, yellow-green sandstone interpolated shale and coal seam, with a total thickness of about 2500m
It evolved from river and lake sedimentation in arid climates to large lake basin sediment types in temperate semi-humid-humid climates. The eastern part is a densified highland, with small mountain basins scattered sporadically.