protometamorphism

例句：

1. 1. The study of protometamorphism is crucial for understanding the early Earth's geological history.
   研究原岩变形作用对于理解早期地球地质历史至关重要。
2. 2.Metamorphic rocks are formed by the transformation of sedimentary rocks through protometamorphism.
   变质岩是通过沉积岩通过原岩变形作用形成的。
3. 3. During protometamorphism, minerals undergo a series of chemical and physical changes that eventually lead to their transformation into new minerals.
   在原岩变形作用过程中，矿物经历一系列化学和物理变化，最终导致其转化为新的矿物。