Volcanoes
Published on Nov 23, 2015
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PRESENTATION OUTLINE
MOUNT. ST. HELEN
- Mount St. Helens is an active stratovolcano located in Skamania County,
- Washington, in the Pacific Northwest region of the United States. It is 96 miles south
- of Seattle, Washington, and 50 miles northeast of Portland, Oregon
- Last eruption: July 10, 2008
- Elevation: 8,366
MOUNT. BAKER
- Mount Baker, also known as Koma Kulshan or simply Kulshan,
- is an active glaciated andesitic stratovolcano in the Cascade
- Volcanic Arc and the North Cascades of Washington State in the United States
- Last eruption: 1880
- Elevation: 10,781
WHAT CAUSES VOLCANOES?
- A volcano is essentially an opening or a vent through which this magma
- and the dissolved gases it contains are discharged.
Photo by flequi
MAGMA & LAVA
- Magma is the molten material beneath the Earth’s crust.
- When it reaches the surface and comes out of a volcano, magma becomes lava.
Photo by lluis.vicens
