migmatite

例句：

1. 1. The migmatite formation is a type of sedimentary rock that is characterized by its fine-grained texture andhigh silica content.
   片麻岩是一种沉积岩，以其细粒结构和高硅含量而著称。
2. 2. In the field, it is common to find migmatite exposed at the surface due to its resistance to weathering.
   在野外，由于其抗风化能力，片麻岩常在地表露出。
3. 3. Migmatite is often used in construction as a building material due to its strength and durability.
   由于其强度和耐用性，片麻岩常被用作建筑材料。