Earth Sciences 1070A/B Lecture Notes - Lecture 6: Zeolite Facies, Metamorphism, Metamorphic Rock
25 Apr 2017
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Document Summary
Defined as the change that takes place within a body of rock as a result of is being subjected to conditions that are different from those of which is was formed. Form by recrystallization or reformation of minerals within an existing rock. Sedimentary or igneous rock recrystallize when higher pressures/temps surpass the original cooling temp of one or more minerals not enough to melt into magma but cause recrystallization by promoting exchange of elements. Describes what happens to rocks when they become buried beneath other rocks and are subjected to higher temps and pressures than at surface. Main influencing factors of mineral makeup: the bulk composition of rock, the pressure and temp conditions at time of crystallization, and composition of fluid phase in rock during metamorphism. Type and degree of change of parent rock depend on type and intensity of individual or combined metamorphic processes. The chemical composition of metamorphic rock is similar to parent.
