ERTH 2415 Lecture Notes - Lecture 17: Lithosphere, Vulcanian Eruption, Shield Volcano
28 Aug 2018
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Document Summary
From rock to: volcanoes are a mechanism by which earth expels its. Magma internal heat quickly: what causes solid rock to melt, most important mechanism: Decompression melting: increase temperature (to, increase water content. Volcanic: hot, solid rock from asthenosphere rises closer to the. Step surface following convection loop: decrease in pressure cause rocks to melt partially, decompression melting, change from solid to liquid accompanied by volume expansion. Melting: the most common process of creating magma, melting occurs by reducing pressure on hot rock, most of the rock that melts to form magma does so because the pressure on it decreases, not because heat is added. Eruptive style: 2 styles, peaceful vs explosive, relation between, tectonic environment, magma composition, eruptive style. Eruption type: 6 types of eruptions, caution: a volcano can change eruption type through. Volcanism time: relation between, magma composition, eruptive style, eruption type, volcanic landform, factors controlling volcanism and volcanic landforms, viscosity, volatiles, volume of magma.
