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Clerical:
It's Volcano Video Week!!!
Quizzes 9-12 are posted.
Homeworks #7 (not graded) and #8 (graded) are posted. Homework #8 will be
completed and turned at the end of class Friday (3/26/10).
Exam #3 will be given in class on Wednesday (3/31/10). The Exam #3 Study Guide is posted.
Learn "The Big Chart". Love "The Big Chart".
Themes of the Day:
- Felsic Magmas
- Stratovolcanoes
- Pyroclastic Eruptions
- Stratovolcanoes & Pyroclastic Eruptions (Slides & Montserrat Video)
Felsic Magmas
- formed by evolution of mafic magmas and melting of the crust
- Generally formed at subduction zones, by fractional crystallization and evolution of mafic magmas. Evolve
into intermediate to felsic composition magmas before crystallizing as diorite/andesite or granite/rhyolite.
- high viscosity - gas rich - explosive
Stratovolcanoes
Pyroclastic Eruptions
Video: Montserrat's Andesite Volcano
Finally, for fun you can try your hand at predicting a volcanic eruption.
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