GLG 111 Lecture Notes - Lecture 6: Calcite, Migmatite, Phyllite
Document Summary
Rock well-consolidated aggregates of one or more mineral. Metamorphic rock all 3 rock types can be metamorphic (igneous, sedimentary,) undergo changes as result of chemical / physical environment. Protolith rock it was derived from every metamorphic rock was once different rock in geo past parent rock. Protolith buried within earth with great temp and pressure and changes into the metamorphic rock. If parent rock is made of one material (quartz) it will have fairly simple composition. Changes rock and make it more compact but made of same thing. Metamorphism to change its form process that leads to changes in mineralogy, texture, and the chemical comp. Occurs when preexisting rock is subjected to a physical and chemical environment that is significantly different from that in which it was initially formed. Heat earths surface cold into earth temp increases provides the energy to drive the chemical reactions that result in the formation of new mineral.
