regional and fault metamorphism 

fault and contact metamorphism

contact and hydrothermal metamorphism

hydrothermal and fault metamorphism

diagenesis

directed stress

extreme temperature

uniform pressure

the sorting of grains by size, as accomplished by rivers and beach waves

the cementation of loose grains and the precipitation of new minerals into pore spaces

the settling of crystals in a melt as it cools

changes in mineralogy and texture in response to heat and stress

schistosity

foliation

non-foliated

lineation

precipitation 

solid-state diffusion

crystallization from melt

lithification

mafic to felsic mineral grains

mineral grains get larger, foliation become more distinct 

coarse and angular grains to finer and rounder grains

mineral grains get smaller, foliation become more less distinct

rotation of minerals

remobilization of minerals