Geo5 Vol Class Notes

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Information about Geo5 Vol Class Notes

Published on February 11, 2008

Author: Saverio


The Lithosphere of Earth:  The Lithosphere of Earth Igneous Processes and Volcanic Activity 1. Why study? • Thermal state • Thermal history • Composition of interior • Geothermal / Hazards • Comparative planetology 2. Volcanism and plate boundaries • Divergent - Continental breakup (Flood basalts) - Mid-ocean ridge • Convergent - Domes, flows, explosive, composite volcanoes • Intraplate Volcanism - Strombolian style - Hawaiian style The Lithosphere of Earth - Volcanism:  The Lithosphere of Earth - Volcanism Strombolian Hawaiian Plinian Volcanic Styles:  Volcanic Styles Strombolian Activity Hawaiian Activity Plinian Activity Dome Growth Spatter Cone Bubble Rise Rate > Magma Rise Rate Cinder Cone Magma Rise Rate > Gas Rise Rate Produces turbulent, buoyant cloud, Rises to great heights Atmosphere sucked in, heated Exit velocity high Low viscosity gas-clast mixture Pressure greatly exceeds atmospheric pressure Cloud collapses to pyroclastic flows Brittle lid Degasses Fracture & Growth Viscous gas-rich magma

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