UBST 253 Lecture Notes - Lecture 1: Plate Tectonics, Shield Volcano, Volcanic Arc
Document Summary
In class review activity (to be handed in at the end of class- 1% of final grade) Midterm 1: in class (~40 multiple choice questions, 20% of final grade) By the end of this lecture you should know: How eruptions can be predicted and hazards mitigated. Where igneous activity takes place in the context of plate tectonic theory. That earth is not unique in possessing volcanoes. Active erupting, recently erupted or likely to erupt. Dormant hasn"t erupted in hundreds to thousands of year. Status determined by historical records, age of erupted rocks, if the volcano still lies within a tectonically active area and the landscape character of the volcano. Constrained by recurrence interval (average time between eruptions in the geologic record) Large error short-term predictions (days . Some volcanoes send out distinct warning months) signs. Warning signs indicate that an eruption is imminent. Gas and steam emission increases magma degassing or groundwater heated by magma.
