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Physical Geography of the U.S.

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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 ... – PowerPoint PPT presentation

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Title: Physical Geography of the U.S.


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
(No Transcript)
4
Western Features
  • Pacific Ranges
  • Formed by colliding plates (Pacific N.A.)
  • Sierra Nevada, Cascade Range, Alaska Range, and
    Coast Mountains (in Canada)

5
Mt. McKinley (Alaska Range) tallest peak in
N.A. at 20,320 feet
6
Western Features
  • Great California Valley
  • alluvial valley
  • out produces any other region in fruit
    vegetable production

7
In Between Landforms
  • Dry basins and plateaus fill area between Pacific
    Ranges and Rockies Why?
  • rain shadow effect from Pacific Ranges

8
In Between Landforms
  • Great Basin Region area of low land surrounded
    by mts.
  • Great Basin, Mojave, Sonoran, Chihuahuan
    Deserts

9
In Between Landforms
  • Death Valley
  • hottest lowest (282 ft. below sea level) place
  • in N. Am.
  • dancing rocks phenomenon

10
(No Transcript)
11
In Between Landforms
  • Columbia Plateau-
  • Created by lava seeping thru cracks
  • Flood basalt
  • Eventually part of crust sank into space left by
    lava

12
(No Transcript)
13
In Between Landforms
  • Colorado Plateau-
  • Created by tectonics and erosion (Colo. River)
  • Grand Canyon _at_ southern end
  • Walls as steep as 6,000 ft

14
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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