sci 245 study notes

Apr 18th, 2015
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Metamorphic rocks originate from igneous, sedimentary, or even other metamorphic rocks. The rocks are formed when there is a change in texture and/or mineral composition in the surrounding area where the rocks exist. This change or "metamorphosis" happens in a solid state, reacting to high pressure and temperature, or hot circulating fluids. These variables add new minerals and textured to the existing ingenious, sedimentary, or metamorphic rock. The variables are added by ordinary methods of metamorphism like regional and contact methods. In order to understand the contact methods it is important to first understand the two different categories of metamorphic rocks, foliated and non-foliated. The first category, foliated, includes gneiss, phyllite, schist and slate. Foliated rocks have a layered or banded look, which is created by exposure to heat or direct pressure. The seco

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