The formation of metamorphic rock
Metamorphic rocks are formed when an igneous rock or sedimentary are put under a large amount of heat and pressure. The heat and pressure causes the mineral grains to flatten and causes the atoms to recombine into new rocks.
types of metamorphism
Contact Metamorphism is a type of metamorphism in which the mineralogy and texture of a body of rock are changed by exposure to the pressure and extreme temperature associated with a body of intruding magma. This prosses often results in the formation of rare minerals such as garnet and emery.
Regional Metamorphism is a type of metamorphism in which the mineralogy and texture of rocks are changed over a wide area by deep burial and heating associated with the large-scale forces of plate tectonics.
Foliated and nonfoliated rocks
Foliated and nonfoliated metamorphic rock
The major difference between foliated and nonfoliated metamorphic rock are the textures. Foiated rocks clearly have a banded and orderly texture/appearance. Whereas the nonfliated rocks have a very random texture with no obvious bands.