Describe the textures of metamorphic rocks. List the most common metamorphic rocks and how they are classified. Describe the three environments of metamorphism. Explain the relationship between metamorphism and plate tectonics. A mineral assemblage stable at low temperatures and pressures may not be stable at elevated temperatures and pressures.
Metamorphism takes place in a variety of geologic settings.
A general outline of metamorphic settings is shown below. It should be noted that with the exception of impact metamorphism, the general types grade into one another. This site was selected for this chapter as it provides a relatively comprehensive analysis of the geology of this fascinating area. In particular, read the sections on the three major rock types and see how that information is incorporated into the geologic history of the region. During the week of Spring Break 1996, we visited Big Bend .