Types of metamorphic rocks: regional metamorphism, contactmetamorphism and dynamic metamorphism.
变质岩 类型：区域变质、接触变质和动力变质。
2
They are probably related to the subduction of the Paleo-Asia Oceanic plate, and their intrusion resulted in the contactmetamorphism of the Majiajie Group.
它们的形成可能与晚古生代古亚洲洋的消减作用有关，该期花岗岩的就位导致马家街群发生了接触变质作用。
3
There is a complete metamorphic series of coal from lignite to meager coal in Wumuchang area, Yimin, the main metamorphism type is contactmetamorphism of coal.