1. Types of Mountains: 1.Folded Mountains. Pressure is applied slowly to the rock so that it bends instead of breaking. Makes folds in the rocks. 2.Faulted Mountains. Pressure breaks the land, causing land to move up r down. Resulting in higher areas (mountains). This is what we have in Nevada 3.Volcanic Mountains. Subduction at convergent boundaries melts rock

2. Examples of folds Syncline:Rock folds point down.

3. Anticline: Folds point up

4. Monocline: One side goes up one side goes down

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

6. 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 Nice Flat land

7. 15 million Years ago The land begins to stretch. Creates normal faults Causing some fault block to sink. High points = Ranges(mountains) Low points = Basins (valleys) Range Basin

8. Pattern seen all over Southwest North-South Running Basins and Ranges

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

10. More Evidence around town

11. Fault Blocks weather and erode over time, so not always sharp drops

12. Las Vegas Alluvial Fans weathered fault blocks

13. Arial View of an Alluvial Fan