Metamorphism Surface Lithification Melting High temperatures come from: Deep Burial Igneous Intrusions High temperatures come from: Deep Burial Igneous Intrusions High pressures come from: Deep Burial Compression during convergence Mountain Building High pressures come from: Deep Burial Compression during convergence Mountain Building

Three Grades of Metamorphism Low Grade Intermediate Grade High Grade

Certain minerals are associated with certain grades of metamorphism. Allows a geologist to determine temperature and pressure at which a rock was formed.

Three types of metamorphism Regional Metamorphism Cover large regions Due to compression Due to deep burial Contact Metamorphism Rocks in contact with igneous intrusions Layers of different grades of metamorphism Hydrothermal Metamorphism Water can cause metamorphism Yellowstone National Park Intrusions and Volcanoes

Textures Foliated Minerals aligned like pages of book Perpendicular to pressure Slate, Phyllite, Schist, Gneiss Nonfoliated No regular pattern Usually from one or few minerals Marble, Quartzite