GEOL 1101 Lecture Notes - Lecture 5: Dome Project, Mudpot, Supreme Headquarters Allied Powers Europe
29 Sep 2016
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Classification by composition of magma and size of cone. *the higher the silica, the more viscous the magma which gives more rupture. Can have fountains or tephra ejections when they erupt. The angles form huge mountains but don"t look like a classic volcano, they have low. Angle sides because the salt continually flows rather than building up. Burns building and covers roads, destroys vegetation, poisonous gases, tsunamis. You can outrun a basalt flow, it becomes great soil, may be the reason we have atmosphere. Explosive in nature (pyroplastic) with intermittent periods of flow and dormacy. Produce huge ash falls, flows, poison gas, and pyroplastic ejecta. May create calderas hole in ground. Initial eruption is explosive, tephra ejections, increased seismic activity, and poisonous gases. Possible mudflows and landslides, destroying forests and habitats, pollutes streams, disrupts. Can still be active with small cinder cones. Often fills with water to produce a lake. Can occur at any subduction boundary or continental hot spot.
