ERS120H5 Study Guide - Final Guide: Metamorphic Rock, Continental Crust, Convergent Boundary
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*describe the importance of each of the five factors, which control the features of metamorphic rocks: pressure, temperature, deformation, composition and time. Metamorphic rocks depend on: pressure >5km deep within earthquake, temperature (approx. 280 to 850) below the needed temp the rocks aren"t hot enough to change, aboeeded temp melts and becomes igneous rock: deformation compression or shear, composition dictates what you start and finish w/ time. Atoms migrating one at a time, result to change in shape over time: neocrystalization: changing combination entirely = new minerals all around, any atom can combine with any atom (new atom, new composition and new minerals. Under pressure, atoms will want to rotate to try to get the least amount of pressure. Explain why during metamorphism tabular (flat) minerals are reoriented or grow perpendicular to the stress. A: during metamorphism tabular (flat) minerals are reoriented or grow perpendicular to stress because. A: protolith is the rock before metamorphism takes place.
