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Formation of the American Southwest (including Nevada)

Formation of the American Southwest (including Nevada). Basin and Range Geology . Hundreds of Millions of Years Ago The American Southwest was under water . Sediment piled creating layers of Sedimentary Rock . The Land was uplifted creating a flat plateau . Plateau: very Flat land.

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Formation of the American Southwest (including Nevada)

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  1. Formation of the American Southwest (including Nevada) Basin and Range Geology

  2. Hundreds of Millions of Years Ago The American Southwest was under water. Sediment piled creating layers of Sedimentary Rock. The Land was uplifted creating a flat plateau. Plateau: very Flat land

  3. 15 million Years ago Basin Range • The land begins to stretch. • Creates normal faults • Causing some fault block to sink. • High points = Ranges(mountains) • Low points = Basins (valleys)

  4. This pattern is seen all over SouthwestNorth-South Running Basins and Ranges

  5. This is how Las Vegas Valley FormedWest side of Valley (Red Rock) North-South Running Range North-South running Basin

  6. More Evidence around town

  7. Fault Blocks weather and erode overtime, so there are not always sharp drops

  8. Las Vegas Alluvial Fansweathered fault blocks

  9. Arial View of an Alluvial Fan

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