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How the Earth Was Made: Yosemite

44 minutes 21 seconds

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

As shown on the History Channel. The Sierra Nevada, North America's highest mountain range, contains one of the most awe-inspiring geological features on the planet: Yosemite Valley. Walled by sheer 3,000-foot granite cliffs and made from one of the toughest rocks on earth, it is home to the mighty El Capitan and iconic Half Dome. Yet how this extraordinary valley formed has been the subject of controversy for over 100 years. Was it carved by gigantic glaciers or a cataclysmic rifting of the Earth?

Media Details

Runtime: 44 minutes 21 seconds

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

Release Year: 2009
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