Ch. 3 hw - metamorphism . The factors that cause this...

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Crystal Cozart ESC1000 September 20, 2009 Ch. 3 Homework 3.) The three main kinds of rock in Earth’s crust are igneous rock, sedimentary rock, and metamorphic rock. 4.) An igneous rock forms when magma solidifies. A sedimentary roc k forms when sediment becomes cemented or compacted into solid rock. A metamorphic rock forms when heat, pressure, or hot water alter any preexisting rock. 5.) The high temperature that exists within a few hundred kilometers of the surface can melt solid rock to form a molten liquid called magma , which then rises slowly toward the Earth’s surface. As it rises, the magma cools to become solid rock again. An igneous rock forms when magma solidifies. 16.)When is rock is heated, when pressure increases, or when hot water alters its chemistry, both its minerals and is textures change in a process called
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Unformatted text preview: metamorphism . The factors that cause this process are rising temperatures, rising pressure, and changing chemical environment. In addition, deformation resulting from movement of Earths crust develops foliation and thus strongly affects the texture of a metamorphic rock. 17.) The minerals and textures in a rock change as it is metamorphosed. Contact metamorphism affects rocks heated by a nearby igneous intrusion. Burial metamorphism alters rocks as they are buried deeply within Earths crust. In regions where tectonic plates converge, high temperature and deformation from rising magma and plate movement all combine to cause regional dynamothermal metamorphism. Hydrothermal metamorphism is caused by hot solutions soaking through rocks and is often associated with emplacement of ore deposits....
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