EARTHSS 17 Lecture Notes - Lecture 9: Sulfur Dioxide, Lahar, Flor
14 Oct 2016
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Document Summary
If you increase the temperature you can go from solid to liquid. You can decrease the pressure liquid phase of rock is less dense than solid. At the core the pressure is extreme -- major decrease in pressure from the center of the earth to the top. Melting can be caused by increased temperature and decreased pressure and water as the rock rises. The products of volcanic eruption take three forms; Can be thin and runny (low viscosity) or thick and sticky (high viscosity) Something with high viscosity will not flow very well. The more silica there is the more tetrahedron. Basalt is able to move more freely. Rhyolite has the most amount of silica of the manet types and it can barely flow at all. Major constituent of ocean crust, volcanic islands, and extensive continental lava flows. Mafic lava -- very hot, low silica , and low viscosity. Basaltic lava flows can cause extensive property damage.
