GEOL 106 Lecture Notes - Sulfuric Acid, The Dead C, Fluorine

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We first need to consider the nature of magma of different. Chemical composition: magma differ in the proportion of elements, results in rocks of different colours, and magmas with different properties. Rock is whiter/pinker -> felsic rock is blacker -> mafic. Read chapter 3 in textbook (pages 72 to 107: do risk analysis and risk management. Volcano zones : constructive (ie. divergent) plate margins, destructive (ie convergent) plate margins, hot spots, most commonly not at plate boundaries (eg. hawaii, both oceanic and continental. Magma: when it comes out of the ground will be in one of the two forms, 1. Fractures (fissures: reaches the surface by coming through either ie. cracks (where a dyke reaches surface) These are calm eruptions: dangers of fissure eruptions. But major eruptions can generate atmospheric effects from so2 gas and co2 gas release (eg. laki eruption in iceland) In particular, enormous flood basalt events may be catastrophic. Linked to mass extinctions (eg, 65 mya)(eg. 2.

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