GLGY 333 Study Guide - Final Guide: Metamorphic Facies, Metamorphic Rock, Igneous Rock
16 Apr 2016
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Liquidus: line represening when the irst solid crystal forms when the rock is cooling, or when the last solid crystal melts during heaing. Peritecic point: the post on a phase diagram where a reacion occurs between a precipitated (solid) phase and the liquid to produce a new solid phase. Cotecic: this line shows the composiions of the ternary liquids that are in equilibrium with binary eutecic minerals. Three cotecics on a ternary system meet at the ternary eutecic: the lowest possible temperature at which a melt can exist in this system at this pressure. Metamorphic rocks form through the transformaion of the pre-exising rock under the acion of pressure, temperature and luids. During metamorphism, the rock remains in solid state and experiences mineralogical, textural and or composiional changes. The nature of the changes experienced by the rock can be divided into two categories.
