February 6 and 8

February 6 and 8 - February 6, 2008 V. LANDFORMS AND...

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February 6, 2008 V. LANDFORMS AND RELATED PROCESSES RESULTING FROM IGNEOUS ACTIVITY A. EXTRUSIVE- VOLCANOES 1. Volcano forms and ejects 2. Volcano eruptive styles and their relations to volcano shape and material spewed p. 131 3. Assessing dormancy 4. Volcanic hazards to humans p. 134-139 Fissure flows/ lava plateaus - Shape = quite flat - Lava = basaltic - Eruptive style = quiet. - Doesn’t look like a volcano at all, several flows of lava Shield Volcano - Mauna Loa on the Big Island - Low angle hill with curved angle - Not very steep, but extremely large. Cinder Cone - Characterized by being not very long lived. - Lower - Explosion of gases, cinders, etc. for a relatively short time. - Steep shape because of cinders falling back down Stratovolcano or Composite Cone - andesite - intermediate between mafic/felsic - form at subduction zones (where? Island arcs, Mt. Saint Helens) - really large like shield volcanoes - However, unlike shield volcanoes that are runny, there’s a lot more gas and water and the eruptions are a lot more explosive. (water turns into gas)
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This note was uploaded on 04/21/2008 for the course EES 101 taught by Professor Miller during the Spring '08 term at Vanderbilt.

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February 6 and 8 - February 6, 2008 V. LANDFORMS AND...

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