ERS120H5 Lecture 13: LEC #13 (Metamorphic Rock)
Document Summary
Format: 30 multiple choice (60%, 5 short answer (40%) What you end up with depends on : pressure (> 5km deep, temperature (~250 c to 850 c) The latter being the melting point of rock: composition of prololith, deformation (compression of shear, time. In order to metamorphose, rocks fo melt just in tiny amounts a time : this claim is false. How do rocks change: recrystallization (same composition, same minerals) The above trait is related to size: phase change (same composition, new minerals, neocrystalization (new composition, new minerals) The above two traits are related to composition: pressure solution, plastic deformation, alignment of minerals. The above three traits are related to shape. Metamorphic types and settings: burial deep burial in a sedimentary basin, mountain belt (regional) really deep burial at the base of a mountain. The above two traits are related to pressure and temperature: thermal (contact) heating by a pluton, dike, or sill, hydro thermal alteration by hot water.
