CRATER LAKE

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CRATER LAKE

• JORDAN G. AND KAYLA A.

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Important Facts

• Crater Lake is located in Medford, Oregon.
• The area of Crater Lake is 180,224 acres
• The National Park was established in
• May 22, 1902
• The visitation was 451,322 (in 2003)
• The governing body is The National Parks Service
  
• www.wikipedia.com

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Geologic History

• The Volcano is known as Mount Mazama.
• Crater Lake partially fills a type of volcanic
  depression called a caldera.
• Mount Mazama begun its last climactic eruption
  about 7,700 years ago.
• This climactic eruption was fed by magma that
  came from 5 Km below the earths surface.
• www.wikipedia.com

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COOL FACTS TO KNOW

• Maximum depth 594 Meters
• Average depth 350 Meters
• The lake is know to be the deepest in the U.S.
  and the seventh deepest in the world
• Gets an average of 533 inches of snow per year.
  (1356cm)
• Evaporation and seepage prevent the lake from
  becoming any deeper.

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MORE FACTS TO LEARN

• The Mount Mazama, part of the Cascade Range
  volcanic arc, was built up mostly of andesite,
  dacite, and rhyodacite over a period of at least
  400,000 years.
• Lava eruptions later created a central platform.
• In time, the caldera cooled it allowed rain and
  snow to accumulate and eventually form a lake.
• Landslides from the caldera rim thereafter formed
  debris fans and turbidite sediments on the
  lakebed.

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IN THIS PICTURE, YOU CAN GET A FAIR IDEA ABOUT
THE SIZE OF THE ISLAND.www.volcano.com