Igneous rocks:
* Basalt: Metamorphosed into greenstone, amphibolite, or eclogite.
* Granite: Transformed into gneiss or migmatite.
Sedimentary rocks:
* Sandstone: Can turn into quartzite.
* Limestone: Metamorphosed into marble.
* Shale: Transformed into slate, phyllite, schist, or gneiss.
Metamorphic rocks:
* Slate: Further metamorphosed into phyllite, schist, or gneiss.
* Marble: Can be further metamorphosed into a variety of other metamorphic rocks.
Key factors for metamorphism:
* Heat: Elevated temperatures cause chemical reactions and mineral changes.
* Pressure: Increased pressure can cause recrystallization and mineral alignment.
* Fluids: Water and other fluids can accelerate chemical reactions and transport materials.
Types of metamorphism:
* Contact metamorphism: Occurs when rocks are heated by contact with an igneous intrusion.
* Regional metamorphism: Occurs over large areas due to tectonic forces and the pressure of buried rocks.
* Dynamic metamorphism: Caused by the shearing and grinding of rocks along fault zones.
So, the key takeaway is that any rock can be transformed by metamorphism, and the resulting metamorphic rock will depend on the original rock type, the intensity of the metamorphic conditions, and the duration of the metamorphic process.
