Sedimentary Facies - the characteristics of a unit of sediments which can be used to interpret the depositional environment. Metamorphism is defined as a set of processes involving heat, pressure, and chemical fluids in which rocks undergo a change in mineralogy, texture, or both. This metamorphism can be found surrounding most igneous rock formations. When a large region of rocks get exposed to high heat and pressure, it is a regional metamorphism . This happens when rocks are buried to a great depth.
Some regional metamorphism is associated with colliding plate boundaries.
Metamorphic Textures can be either foliated or non-foliated. Foliated metamorphic rocks contain mineral grains that have been flattened. The grains form an elongated, rod-like appearance. Non-foliated metamorphic rocks contain mineral grains that are equidimensional. A high grade metamorphic rock is generated in high temperatures and pressures.