泰山
The Luxi region (including Mount Tai) used to be a huge subsiding belt or sea canal. The orogeny made the rock layers on the subsidence zone folded and uplifted into ancient land, forming a huge mountain system, which has experienced 2 billion years of weathering and denudation, and the terrain has gradually become flat. About 600 million years ago, Mount Tai sank into the sea again. After more than 100 million years, the entire area rose to land again, and the ancient Mount Tai uplifted into a relatively low barren hill. In the late Mesozoic period about 100 million years ago, due to the extrusion and subduction of the Pacific plate to the Eurasian Plate, the Taishan stratum experienced extensive folds and fractures under the influence of the Yanshanian. During the crustal movement above, Mount Tai was rapidly uplifted. In the mid-Cenozoic period about 30 million years ago, the outline of Mount Tai was basically formed today.