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

2. 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

3. 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.

4. 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

5. Medicine Lake
Mount Shasta

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

7. Mount Fuji
Mount Hood

8. 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

9. 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.

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

11. Resources TITLE PAGE SHIELD CINDER CONE Mount Shasta: Medicine Lake:
SHIELD
CINDER CONE
Mount Shasta:
Medicine Lake:
COMPOSITE
Mt. Fuji:
Mount Hood:
ANCIENT VOLCANIC ERUPTIONS
Vesuvius:
Krakatoa: