Abby Budin, Amanda Miller and Nikki Prior

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Abby Budin, Amanda Miller and Nikki Prior Volcanoes Abby Budin, Amanda Miller and Nikki Prior SCI 210 Geology October 12, 2005

Shield Volcano Form of Volcano: Slightly Sloped 6-12 degrees Size: Up to 9000m high Type of Magma: Basalt Style of Activity: Gentle, some fire fountains Examples: Hawaii

Mauna Loa Mauna Loa, the largest of the shield volcanoes, is 13,677 feet above sea level, which means it rises over 28,000 feet above the deep ocean floor, and would be the worlds tallest mountain if much of it were not underwater.

Cinder Cone Form of Volcano: Moderate slope Size: 100-400m high Type of Magma: Basalt or andesite Style of Activity: Ejections of pyroclastic material Examples: Paricutin, Mexico

Medicine Lake Mount Shasta

Composite Volcano Form of Volcano: Alternate layers of flows and pyroclastics Size: 100-3500m high Type of Magma: Variety of types of magmas and ash Style of Activity: Often violent Examples: Vesuvius, Mount St. Helens, Aconcagua

Mount Fuji Mount Hood

How do volcanoes affect climate? Ash and gas spewed Some falls or washes out, some shoot into stratosphere Ash and gas in stratosphere causes haze Haze shades and cools Earth enough to cause a climate change Pinatubo in Philippines (1991) 15 million tons of sulfur dioxide Solar radiation declined 2-4% Temperature rose again in 1994 Put more aerosols into the stratosphere than any other volcano in the 20th century http://earthbulletin.amnh.org/D/3/1/

Vesuvius 79 A.D. Destroyed Roman cities of Pompeii, Herculaneum and several neighboring villages near what is now Naples, Italy. Buried the villages 5-8m of hot ash Inactive for 700 years prior to the eruption.

Krakatoa 1883 SW Pacific Ocean Generated tsunamis Killed 36,000 people

Resources TITLE PAGE SHIELD CINDER CONE Mount Shasta: Medicine Lake: http://www.wallys.com/art/volcanoe.jpg SHIELD http://www.windows.ucar.edu/tour/link=/earth/interior/shield_volcanos.html http://library.thinkquest.org/17457/volcanoes/types.shield.php CINDER CONE http://pubs.usgs.gov/gip/volc/types.html Mount Shasta: http://vulcan.wr.usgs.gov/Volcanoes/Shasta/images.html Medicine Lake: http://vulcan.wr.usgs.gov/Imgs/Jpg/MedicineLake/glass_mtn.jpg COMPOSITE Mt. Fuji: http://www.denney-net.co.uk/Kawaguchiko%20Mount%20Fuji.jpg Mount Hood: http://www.taphilo.com/photo/pictures/Mount-Hood.jpg ANCIENT VOLCANIC ERUPTIONS Vesuvius: http://www.j-m-w-turner.co.uk/artist/gifetc/turner-vesuvius.jpg http://faculty.ed.umuc.edu/~jmatthew/naples/eruption03.JPG Krakatoa: http://hypatia.morelos.gob.mx/no3/imagenes/KRAKATOA.jpg