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The earth is not finished, but is now being, and will forevermore be re-made. - C.R. van Hise (1898) Metamorphic Rocks Webpage for course (daytime) Webpage for course (nighttime) Lecture 10 Three types of rocks: - Igneous -Sedimentary - Metamorphic Not “formed” as much as “reformed” Sedimentary rocks: Form at room temperature Atmospheric pressure What happens when pre-existing rocks are subjected to high P & T? Their minerals may no longer be stable Bread analogy Two general types of metamorphism Regional metamorphism Contact metamorphism Contact metamorphism dike Regional metamorphism Metamorphic rocks are divided into two groups Foliated < http://mulch.cropsoil.uga.edu/soilsandhydrology/ Important%2520Rocks%2520%26%2520Minerals.htm&usg > Nonfoliated < http://www.personal.psu.edu/cll161/insys%2 520441/images/foliate.jpg&imgrefurl Foliated Granite >>>>>>>>>> Gneiss Shale >>>> Slate >>>> Phyllite >>>> Schist < http://charlottehutson.wordpress.com/2010/03/02/early-gravestone-art-in-charleston/&usg > Nonfoliated Limestone >>>>>>>>>> Marble Sandstone >>>>>>>>>> Quartzite Metamorphic Rocks as Building materials What is the “best” building material? Define “best” inexpensive beautiful longlasting
