ENVR 1200 Lecture Notes - Lecture 2: Weathering, Uniformitarianism, Dynamic Earth
11 Dec 2016
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Envr 1200: dynamic earth second exam study guide. The second exam will have the same format as the first exam. Volcanic damage by lava, ash, pyroclastic flows, and lahars. The factors that control magma viscosity (si content and magma/lava temperature) The factors that determine the violence of a volcanic eruption (magma viscosity and the amount of trapped gasses) Explain the factors that control why volcanoes occur in some parts of the planet, but not others (i. e. mid- ocean ridge, subduction zones and hot spots, but not transform plate boundaries or continental collision zones). This not only includes where they occur, but why they erupt with particular magma compositions and violence. Volcanic eruptions are somewhat predictable (seismic activity, volcano swelling, gas emissions) Efforts to prevent damage from lava flows have included spraying lots of water onto and into the lava flow. A jet flying through an ash cloud is problematic: sandblasted windows and damaged engines.
