Metamorphic Rocks: 3 Agents of Metamorphism

Explains how metamorphic rocks form from protoliths due to high pressure, temperature, or chemically active fluids. Discusses foliation, how metamorphic rocks are classified, and where the three basic types of rocks can be found. The presentation ends with an interesting map showing the distribution of igneous, sedimentary, and metamorphic rocks across the state of California. This is followed by a 'Learning Check' with five review questions for self-checking. (Created by a geology professor at Canada College, Redwood City, California.) [11:29]