1. Orogenesis
“mountain building”

2. Mountains are > 300 m in height, and
have a discernable summit and sloping sides.

3. Types of Mountains Volcanic Mountains
form by the accumulation of lava flows and tephra.
Ex. Mauna Kea or Kilauea on Hawaii

4. Kilauea

5. Types of Mountains Fold Mountains
form by intense folding where plates collide.
Ex. Himalayas, Urals, Rockies

6. Himalayas

7. Himalayas

8. Types of Mountains Fault-Block Mountains
form by normal faults where the crust has been fractured by tensional stresses.
Ex. Tetons of Wyoming, Sierra Nevada Range in California

9. Teton Range

10. Types of Mountains Unwarped Mountains
form when a large area of the crust is pushed upward by forces from within the earth.
the cause is not clear as they occur far from plate boundaries.
Ex. Adirondack Mountains of New York