volcan_hazards

volcan_hazards - Volcanic Activity Volcanic activity tracks...

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Unformatted text preview: Volcanic Activity Volcanic activity tracks tectonic plate boundaries What is a volcano? – An erupting vent through which molten rock surfaces. – A mountain built from eruptions Volcanic Architecture Fractional Crystallization Bowen Reaction Series + Mafic Felsic Mafic minerals/rocks cool from very hot molten rock Felsic minerals/rocks cool from very cool molten rock Therefore, parent magmas must be super hot (1,300o C) Therefore, parent magmas must be super cool (700o C) Super hot liquids are runny and easily extruded as lavas Super cool liquids are rigid and do not flow easily Pahoehoe (pa-hoy-hoy) A’a’ (ahah) Ash Mt. Vesuvius – in the year 79 Destroyed Pompeii, killing 20,000 Ash Mt. Vesuvius – in the year 79 Destroyed Pompeii, killing 20,000 Krakatau - 1883 Phreatomagmatic eruption Krakatau - 1883 Phreatomagmatic eruption Krakatau - 1883 Phreatomagmatic eruption Krakatau - 1883 Phreatomagmatic eruption ...
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This note was uploaded on 03/15/2012 for the course GEOL 01:460:100 taught by Professor Christopherlepre during the Spring '12 term at Rutgers.

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volcan_hazards - Volcanic Activity Volcanic activity tracks...

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