EARTH 119 Chapter Notes - Chapter 8: Pressure Solution, Shock Metamorphism, Mylonite
13 Oct 2016
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Document Summary
Earth 119- chapter 8: metamorphism: a process of change. Metamorphic rock: rock that forms when preexisting rock changes into new rock as a result of an increase in pressure and temperature and/or shearing under elevated temperatures; metamorphism occurs without the rock first becoming a melt or sediment. Protolith: the original rock from which a metamorphic rock formed. Metamorphism: the process by which one kind of rock transforms into a different kind of rock. Metamorphic minerals: new minerals that grow in place within the solid rock only under metamorphic temperatures and pressures. Metamorphic texture: the arrangement of mineral grains. Metamorphic foliation: a fabric defined by parallel surfaces or layers that develop in a rock as a result of metamorphism; schistosity and gneissic layering are examples. Pressure: force per unit area, or the push acting on a material in cases where the push (compressional stretch) is the same in all directions.
