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How the Earth Was Made: Mount St. Helens

44 minutes 50 seconds

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Lava field in foreground with evergreen trees and snowy mountain in background. Caption: Southwest of St. Helens, he investigates an area

As shown on the History Channel. Over 20 years ago, Mount St. Helen's--thought to be dormant--shocked America when it exploded. It is an acidic volcano--the magma beneath is full of volatiles making it highly explosive. A new plug has formed in its throat and is rising. When it blows, it will be like uncorking a champagne bottle, releasing pressure below and allowing dissolved gases to escape and explode. The question is, When will it blow again?

Media Details

Runtime: 44 minutes 50 seconds

Topic: Geography, Science
Subtopic: Geology, U.S. Geography
Grade/Interest Level: 9 - 12
Standards:

Release Year: 2010
Producer/Distributor: A & E Television Network
Series: How the Earth Was Made
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Steeply sloping walls of layered, red sedimentary rock. Caption: the Grand Canyon remains the most famous of them all.

A volcano emits ash and smoke, as seen from a city street. Caption: (narrator) It's the nightmare scenario that everyone fears.

Molten, glowing sphere being pelted by rocks. Caption: was the fledgling Earth.

Sand dunes. Caption: The wind that builds them also blows them away,

A rocky sheer cliff with a river cascading down the face of it, as seen from above. Caption: is shaping this magnificent landscape.

Illustration of a plate of Earth's crust being pushed beneath a second plate. Caption: (narrator) As the two plates moved towards each other,

Lava shooting into the air. Caption: pouring out of volcanoes all around the Ring of Fire.

Tall, snowy, and rocky mountain as seen from below. Caption: Is Everest shrinking or growing?

Several volcanoes oozing lava and emitting smoke. Caption: They were pushed back by these mountains of fire.

Lava field in foreground with evergreen trees and snowy mountain in background. Caption: Southwest of St. Helens, he investigates an area