GEOL 1001 Study Guide - Metamorphic Rock, Protolith, Mica
Document Summary
Learning objectives: 5 conditions causing metamorphism, what are the different metamorphic rocks, how do we heat rocks? (burial [increases t and p] and conduction [increases t], 3 types of metamorphism, metamorphism, background. By solid-state change of pre-existing rock called a protolith. Solid-state => minerals change (regrow or recrystallize) No melt (melt would indicate igneous rock) Change => new mineral grow or new texture: modification of environment => cause metamorphism, change in temperature. Heat breaks atomic bombs => recrystallization: change in pressure. Squeezed minerals => atoms compress: increasing pressure and temperature. Temperature/ pressure change => minerals become unstable, new ones form: undergoes compression (shear) Compress => apply force perpendicular to the side of the rock. Shear => applying force parallel to the sides of a rock. Alternating bands of dark and light (rock is solid, one it melts it becomes igneous: reaction with hot water. Take the protolith and hot water => changed composition.
