Metamorphic Rocks Review of Notes

The definition of metamorphism is the mineralogical, chemical, and structural adjustment of solid rocks to elevated conditions of temperature and pressure. Metamorphic rocks are formed by a metamorphic process.
The depth range of metamorphic rocks is 5-40 km below the crust and in temperatures ranging from 150-1000 C. T
The causes of metamorphism are...

• Heat
• Pressure
• Chemically active fluids (extremely hot fluids)

The things that metamorphism does to rocks is...

• Compaction
• Chemical recrystallization

There are two types of metamorphic rocks foliated and non-foliated. On foliated rocks you can see bands, like in the picture of gneiss above. In non-foliated rocks you can't see bands in it.

Metamorphic rocks can become other metamorphic rocks.
Shale (sedimentary) --> Slate --> Phyllite --> Schist --> Gneiss --> Migmatite