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San Andreas Fault Zone

San Andreas Fault Zone

The San Andreas fault zone

  • Exhibition Text

    • The 1,200-kilometer-long San Andreas fault zone is part of the boundary between the Pacific and North American plates, and thus is known as a transform fault. It connects the East Pacific Rise in the Gulf of California with the junction of the Mendocino fracture zone and the Cascade subduction zone to the north. The Pacific plate has moved about 300 kilometers northward relative to the North American plate since the fault began, some 30 million years ago. Moving at 5 to 7 centimeters a year, the San Andreas is one of the most active fault zones in the world.

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  • For Educators

    • Topic: Earth Science

      Subtopic: Plate Tectonics

      Keywords: Geology, Earthquakes, Plate tectonics, San Andreas Fault (Calif.)

      Audience: General

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