CEE 1030 Lecture Notes - Lecture 13: Kola Superdeep Borehole, Metamorphic Rock, Geothermal Gradient
17 Sep 2020
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Document Summary
Form intrusive rocks at depth or form extrusive rocks at the surface. Start with rain, causes weathering of rocks, particles that are eroded go into some sort of river, carried to a side of deposition, lithified and turned into sedimentary rocks. Any rock can turn into another type of rock (no specific order) From greek meta (change) and morph (form) Materials change as a result of added heat and/or pressure (metamorphism) Changes in mineralogy, texture, and often chemical composition of a solid rock subjected to conditions very different to those in which it initially formed. Effects of metamorphism depend on parent rock: igneous, sedimentary, metamorphic. Fluids - important agents of metamorphism because they speed things along. End rock depends on: parent rock, or protolith (composition) Provides energy and speeds up chemical reactions. Recrystallization of existing minerals - nothing changes besides the order of the minerals. Formation of new stable minerals (fairly common in metamorphic rocks)
