Viscosity amount of dissolved Volatiles Volume low viscosity - PowerPoint PPT Presentation

Jul 26, 2023 •201 likes •301 views

Viscosity amount of dissolved Volatiles Volume low viscosity (shield) less water less vigorous effusive more water more vigorous lava fountains SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards low viscosity high

• Viscosity • amount of dissolved Volatiles • Volume low viscosity (shield) less water less vigorous effusive more water more vigorous lava fountains SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
low viscosity high viscosity (shield) (strato) less vigorous less water small explosions effusive more vigorous more water large explosions; lava fountains pyroclastic flows SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: large amounts; very low-viscosity � non-explosive � lava: low-viscosity � non-explosive � lava: small amounts; medium-viscosity � “peacefully explosive” � cinder cones � lava: high-viscosity � moderately violent SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: large amounts; very low-viscosity � non-explosive � lava: low-viscosity � non-explosive � lava: small amounts; medium-viscosity � “peacefully explosive” � cinder cones source: woodpress � lava: high-viscosity � moderately violent SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: large amounts; very low-viscosity � non-explosive � lava: low-viscosity � non-explosive source: USGS source: wikipedia � lava: small amounts; medium-viscosity � “peacefully explosive” � cinder cones � lava: high-viscosity � moderately violent SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: large amounts; very low-viscosity � non-explosive � lava: low-viscosity � non-explosive source: wikipedia � lava: small amounts; medium-viscosity � “peacefully explosive” � cinder cones � lava: high-viscosity � moderately violent SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: very high viscosity � violent eruptions � very high eruption column (> 10km) Mt. Vesuvius, Pompeii 79 A.D. SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards
� lava: very high viscosity � violent eruptions � very high eruption column (> 10km) Mt. Vesuvius, Pompeii 79 A.D. SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards Mt St. Helens 1980; source: wikipedia
• measure for volume, eruption column, duration SIO15-13: Lecture 8 Volcanic Eruption Styles and Hazards

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