The  discovery of coesite in continental crust led to the suggestion that a UHP form of this process existed.
In pioneering studies of this process, Eskola created the delightfully named ACF diagram. THERMOCALC is a program  used to create petrogenetic grids and pseudosections for this process. Deformation can be added to one method for tracing  this process, P-T-t paths. Isograds separate regions where this process is characterized by an index material. The  discovery of coesite in continental crust led to the suggestion that a UHP form of this process existed. The cataclastic form  of this process can occur at faults. (*) Eclogite is one of the more interesting products of this process. The two dominant types of this process are regional, also called Barrovian, and contact. The products of its regional type can be subdivided into schist,  slate, and gneiss based partially on foliation. For 10 points, name this process in which pressure and temperature change the  composition of igneous and sedimentary rocks.
In pioneering studies of this process, Eskola created the delightfully named ACF diagram.
metamorphism [accept word forms]  3