* Igneous: Rocks formed from the cooling and solidification of magma or lava (examples: granite, basalt, gabbro).
* Sedimentary: Rocks formed from the accumulation and cementation of sediments (examples: sandstone, limestone, shale).
* Other metamorphic rocks: Yes, even existing metamorphic rocks can be transformed into different metamorphic rocks by further heat and pressure.
Important Note: The parent rock doesn't completely determine the resulting metamorphic rock. The specific minerals present, the degree of heat and pressure, the presence of fluids, and the time of transformation all play a role in the final composition and texture of the metamorphic rock.
Here are some examples:
* Marble is a metamorphic rock that forms from the parent rock limestone.
* Slate is a metamorphic rock that forms from the parent rock shale.
* Quartzite is a metamorphic rock that forms from the parent rock sandstone.
* Gneiss can form from a variety of parent rocks like granite, basalt, or even other metamorphic rocks.
Let me know if you'd like more examples or details!
