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Physical Geology Laboratory Tuesday Tom Burbine tomburbine@astro.umass.edu. Midterm. Next Tuesday Covers all the labs from September 8 th to October 12 th You can bring in the mineral identification sheets that you filled out in class. Metamorphic Rocks.
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Physical Geology LaboratoryTuesdayTom Burbinetomburbine@astro.umass.edu
Midterm • Next Tuesday • Covers all the labs from September 8th to October 12th • You can bring in the mineral identification sheets that you filled out in class
Metamorphic Rocks • Rocks changed by intense heat, intense pressure, or the action of watery hot fluids • Every metamorphic rock has a parent rock
Scales • Contact metamorphism – occurs locally • Adjacent to igneous intrusions or along fractures that are in contact with watery hot fluids • Low to moderate pressure • Regional metamorphism – occurs over very large areas • Generally accompanied by folding of rock layers • Moderate to extreme pressure and heat associated with deep burial or tectonic movements of rock and/or widespread migration of hot fluids from one region to another
Texture • Foliated - Layering • Nonfoliated - no obvious layering