1. Chapter 6.3. Metamorphic rock Metamorphism: the process in which one type of rock changes into a metamorphic rock heat, pressure, and hot fluids cause metamorphism

2. The diagram below shows how the type of rock that forms during metamorphism indicates the conditions under which the metamorphism occurred.

3. 2 types of metamorphism: 1)Contact Metamorphism: magma is in a contact with the surrounding rocks 2) Regional Metamorphism: changes in temperature and pressure over a large area – result of tectonic forces – most common type

4. Classification of Metamorphic Rocks 1.Foliated Rocks: grains are arranged in planes or bands Examples: slate, schist, and gneiss. 2. Nonfoliated Rocks: grains are not arranged Usually only one mineral Examples: marble and quartzite.