1. 4 Types of Mountains zfault-block zvolcanic zupwarped zfolded

2. Mountain Age zOlder mountains- not as high; rounded; may have stopped forming zYounger mountains- high and rugged; still forming

3. Fault Block Mountains zSierra Nevada in California zTeton Range in Wyoming ySee page 300 yHuge blocks of rock are separating from surrounding rock; jagged peaks yRock layers are being pulled from opposite directions and the blocks slide downward.

4. Sierra Nevadas

5. Grand Teton Mountains

6. Folded Mountains zTwo plates push together and squeeze rock layers which cause rocks to buckle and fold. yAppalachian Mountains are an example. yNorth Am. and African plates converged together

7. Appalachian Mountains

8. Upwarped Mountains zSouthern Rocky Mountains zBlack Hills in South Dakota yForces inside Earth push up crust yThe sedimentary rock layers will erode, exposing the igneous or metamorphic rocks underneath.

9. Black Hills

10. Southern Rocky Mountains

11. Volcanic Mountains zWashington’s Mount Saint Helens xSome volcanic mountains are caused by subduction zones where convergent boundaries form. The oceanic plate sinks under the continental plate. xSome volcanic mountains are caused by hot spots (Hawaiian Islands)

12. Mount Saint Helens

13. Hawaiian Islands zVolcanoes-- formed from hot spots

14. Other types of uplift zIsostasy- the principle that states the Earth’s lithosphere floats on a plasticlike upper part of the mantle, the asthenosphere. zAs mountains continue to grow they, they sink down deeper into the mantle. zAs mountains erode, the mountain rises again because the weight has been removed.