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Physical Geography of the U.S. & Canada

Physical Geography of the U.S. & Canada. Chapter 5 Section 1. - U.S. & Canada cover 7 million sq. miles - 12% of Earth. Western Features. Pacific Ranges Formed by colliding plates (Pacific & N.A.) Sierra Nevada, Cascade Range, Alaska Range, and Coast Mountains (in Canada).

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Physical Geography of the U.S. & Canada

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  1. Physical Geography of the U.S. & Canada Chapter 5 Section 1

  2. - U.S. & Canada cover 7 million sq. miles - 12% of Earth

  3. Western Features • Pacific Ranges • Formed by colliding plates (Pacific & N.A.) • Sierra Nevada, Cascade Range, Alaska Range, and Coast Mountains (in Canada)

  4. Mt. McKinley (Alaska Range) = tallest peak in N.A. at 20,320 feet

  5. Western Features • Great California Valley • alluvial valley • out produces any other region in fruit & vegetable production

  6. In Between Landforms • Dry basins and plateaus fill area between Pacific Ranges and Rockies – Why? • rain shadow effect from Pacific Ranges

  7. In Between Landforms • Great Basin Region: area of low land surrounded by mts. • Great Basin, Mojave, Sonoran, & Chihuahuan Deserts

  8. In Between Landforms • Death Valley: • hottest & lowest (282 ft. below sea level) place in N. Am. • dancing rocks phenomenon

  9. In Between Landforms • Columbia Plateau- • Created by lava seeping thru cracks • Flood basalt • Eventually part of crust sank into space left by lava

  10. In Between Landforms • Colorado Plateau- • Created by tectonics and erosion (Colo. River) • Grand Canyon @ southern end • Walls as steep as 6,000 ft

  11. Hoover Dam • Built on Colorado River b/w Arizona and Nevada (1931-1935) • What is purpose of building dam? • to provide irrigation, flood control, and hydroelectric-power

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