Types of metamorphic rocks: regional metamorphism, contact metamorphism and dynamicmetamorphism.
变质岩 类型：区域变质、接触变质和动力变质。
2
The dynamicmetamorphism of disturbed coals and the effect of radical density on coal gas outburst prediction are discussed.
在实验基础上进一步探讨了构造煤的动力变质作用和自由基浓度在煤和瓦斯突出预测中的作用。
3
The initial collision age is younger than that of the oceanic crust disappearing on the surface, and older than that of the formation of strong deformation and dynamicmetamorphism.